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Italy · Detailed regional profile

Piedmont

A northwestern Italian region known for Nebbiolo, Barbera, Dolcetto, and several aromatic white grapes.

The Alps, fog, hail, and autumn weather all matter in a growing season that often runs late.

Climate comparisons use the 1991–2020 combined regional record · updated through Aug 20, 2026.

Vineyards and a village in Piedmont, Italy
Mauro Sassano / Pexels

Current conditions

Observations through Aug 30, 2026 · 06:00 UTC

Temperature20.0°C
Dew Point16.4°C
Relative Humidity80%
24h Rainfall0.0 mmmodeled IFS total through Aug 29

Vintage explorer

Compare this vintage →

Slightly warmer and significantly wetter than normal.

Mean temperature19.0°C
Temperature anomaly+0.3°Cvs 1991-2020
Growing degree days1940base 10°C
Hot days0≥ 34°C

What stood out in 2024

Frequent rain can mean more canopy growth and more disease pressure. Rain close to harvest can raise rot pressure and shorten the picking window.

Wetter than baseline · Moderate confidence

Growing-season precipitation was 275 mm above the 1991–2020 baseline.

Frequent rain can mean more canopy growth and more disease pressure.

More harvest rain than usual · High confidence

Harvest-window precipitation totaled 404 mm, +163 mm versus baseline.

Rain close to harvest can raise rot pressure and shorten the picking window.

How unusual was 2024?

The ranking compares vintages that meet the data-coverage threshold and use the same source, regional rules, and 1991-2020 baseline.

Growing-season temperature

14th warmest of 35 vintages Warmer than 21 of 34 other vintages 19.0°C

Growing-season rainfall

2nd wettest of 35 vintages Wetter than 33 of 34 other vintages 1012.8 mm

Heat accumulation

14th highest of 35 vintages Higher than 21 of 34 other vintages 1941 GDD

Hot days

16th most of 35 vintages More than 0 of 34 other vintages 0 days

2024 month by month

Compared with 1991–2020

Follow heat accumulation, rainfall, frost exposure, and the region’s growing and harvest windows in calendar order.

Frost watch Growing season Harvest window
  1. 1–31
    Frost watch

    Heat accumulation

    2024 0 GDD
    Typical 29 GDD

    Rainfall

    2024 254.5 mm
    Typical 77.9 mm
    2024 freezing days
    0
    Typical
    2.7

    Heat accumulation ran behind the typical month.

  2. 1–30
    Frost watchGrowing season

    Heat accumulation

    2024 105 GDD
    Typical 93 GDD

    Rainfall

    2024 100.4 mm
    Typical 109.7 mm
    2024 freezing days
    0
    Typical
    0.0

    Close to the typical monthly pattern.

  3. 1–31
    Frost watchGrowing season

    Heat accumulation

    2024 189 GDD
    Typical 222 GDD

    Rainfall

    2024 229.9 mm
    Typical 124.3 mm
    2024 freezing days
    0
    Typical
    0.0

    Wetter than the typical month.

  4. 1–30
    Growing season

    Heat accumulation

    2024 308 GDD
    Typical 336 GDD

    Rainfall

    2024 142.4 mm
    Typical 103.1 mm

    Wetter than the typical month.

  5. 1–31
    Growing season

    Heat accumulation

    2024 456 GDD
    Typical 426 GDD

    Rainfall

    2024 82.9 mm
    Typical 71.7 mm

    Close to the typical monthly pattern.

  6. 1–31
    Growing season

    Heat accumulation

    2024 480 GDD
    Typical 417 GDD

    Rainfall

    2024 53.3 mm
    Typical 87.8 mm

    Drier than the typical month.

  7. 1–30
    Growing seasonHarvest window

    Heat accumulation

    2024 246 GDD
    Typical 267 GDD

    Rainfall

    2024 163.5 mm
    Typical 116.4 mm

    Wetter than the typical month.

  8. 1–31
    Growing seasonHarvest window

    Heat accumulation

    2024 156 GDD
    Typical 120 GDD

    Rainfall

    2024 240.4 mm
    Typical 124.7 mm

    Heat accumulation ran ahead of the typical month.

View milestone calendar data as a table
Month2024 GDDTypical GDD2024 rainfallTypical rainfall2024 freezing daysTypical freezing days
March 2024 0 GDD 29 GDD 254.5 mm 77.9 mm 02.7
April 2024 105 GDD 93 GDD 100.4 mm 109.7 mm 00.0
May 2024 189 GDD 222 GDD 229.9 mm 124.3 mm 00.0
June 2024 308 GDD 336 GDD 142.4 mm 103.1 mm Outside frost windowOutside frost window
July 2024 456 GDD 426 GDD 82.9 mm 71.7 mm Outside frost windowOutside frost window
August 2024 480 GDD 417 GDD 53.3 mm 87.8 mm Outside frost windowOutside frost window
September 2024 246 GDD 267 GDD 163.5 mm 116.4 mm Outside frost windowOutside frost window
October 2024 156 GDD 120 GDD 240.4 mm 124.7 mm Outside frost windowOutside frost window
Calendar data and method

Monthly values are weighted across every configured regional sample using stored Google ARCO ERA5 daily reanalysis. “Typical” is the mean monthly total across 30 baseline seasons. GDD is counted only inside the configured growing window; freezing days are counted only inside the frost-watch window; rainfall covers every displayed calendar day.

Selected-vintage coverage is 100%. Source rows were last retrieved Aug 20, 2026.

Replay the 2024 growing season

214 daily regional observations

Move through the season to follow temperature, rainfall, accumulated heat, and recorded weather events day by day.

Replay data and method

Daily values are weighted across every configured regional sample using stored Google ARCO ERA5 reanalysis. Coverage is 100%. Source rows were last retrieved Aug 20, 2026.

Closest weather matches

These years had the most similar growing-season and harvest weather.

  1. Closest match

    2000

    Most alike in Hot-day count and Spring frost exposure.

    Hot-day count
    the same: 0 days
    Spring frost exposure
    the same: 0 days

    Largest difference: Growing-season mean temperature — cooler

    View 2000 →

  2. Second closest

    1999

    Most alike in Hot-day count and Growing degree days.

    Hot-day count
    the same: 0 days
    Growing degree days
    lower: 26 GDD

    Largest difference: Growing-season precipitation — less rain

    View 1999 →

  3. Third closest

    1994

    Most alike in Spring frost exposure and Hot-day count.

    Spring frost exposure
    the same: 0 days
    Hot-day count
    more hot days: 1 day

    Largest difference: Growing-season precipitation — less rain

    View 1994 →
How similar years are calculated

Method analog-v1-2026-07 standardizes six weather measures across 34 complete ARCO ERA5 comparison years, then measures the distance between them. The calculation runs when the page is requested.

Measures used: Growing-season mean temperature (20%); Growing degree days (15%); Hot-day count (15%); Growing-season precipitation (20%); Harvest precipitation (20%); Spring frost exposure (10%).

Calculated distances: 2000 0.207; 1999 0.871; 1994 0.891.

Growing-season temperature anomalyCompared with 1991-2020
Temperature anomaly by vintage, 1991 to 2026 A line above zero indicates a warmer growing season than the 1991–2020 baseline. Select a point to inspect that vintage. +3.5°C −3.5°C 1991 2000 2010 2020 2026
Growing-season rainfall anomaly
Rainfall anomaly by vintage, 1991 to 2026 Bars show millimeters above or below the 1991–2020 growing-season baseline. Select a bar to inspect that vintage. +500 mm −500 mm 1991 2000 2010 2020 2026
View historical chart data as a table
YearTemperature anomalyRainfall anomalyHot days
1991-0.9°C-112 mm1
1992-1.3°C+240 mm0
1993-1.0°C+207 mm0
1994-0.6°C+60 mm1
1995-0.8°C+76 mm0
1996-1.2°C+10 mm0
1997-0.1°C-235 mm0
1998-0.1°C-1 mm4
1999+0.2°C+50 mm0
2000+0.0°C+277 mm0
2001+0.1°C-113 mm0
2002-0.8°C+275 mm0
2003+1.4°C-337 mm18
2004-0.2°C-125 mm0
2005+0.1°C-61 mm0
2006+0.7°C-115 mm7
2007+0.2°C-133 mm0
2008-0.4°C+44 mm0
2009+0.7°C-16 mm0
2010-0.7°C+127 mm0
2011+0.9°C-230 mm4
2012+0.0°C-4 mm2
2013-0.2°C+143 mm0
2014-0.1°C+46 mm0
2015+0.4°C+45 mm4
2016+0.2°C-92 mm0
2017+1.0°C-248 mm4
2018+1.2°C+147 mm0
2019+0.7°C+63 mm5
2020+0.5°C+11 mm3
2021+0.4°C-173 mm3
2022+2.5°C-211 mm16
2023+1.8°C+19 mm13
2024+0.3°C+275 mm0
2025+0.5°C+35 mm3
2026+3.2°C-488 mm16

winter

6.1°C

+2.1°C vs baseline

263 mm rain · +62 mm

spring

13.1°C

+0.0°C vs baseline

584 mm rain · +273 mm

summer

23.5°C

+0.7°C vs baseline

278 mm rain · +16 mm

harvest

16.6°C

+0.3°C vs baseline

403 mm rain · +163 mm

Weather events

Periods that crossed one of the published regional thresholds, shown in date order.

  1. Concentrated harvest rain

    Total rain
    59.9 mm
    Highest 3-day total
    58.3 mm
    Trigger threshold
    51.8 mm

    A large share of the season's rain fell during the harvest period.

  2. Concentrated harvest rain

    Total rain
    96.2 mm
    Highest 3-day total
    90.7 mm
    Trigger threshold
    51.8 mm

    A large share of the season's rain fell during the harvest period.

How events are detected

Weather & Vines combined regional series; method event-timeline-v2-2026-07, rules piedmont-v4-2026-08. Source last updated Aug 20, 2026, calculated Aug 29, 2026. Each configured point must have at least 95.0% coverage.

1991–present

Climate change

Measured regional trends are shown separately from model projections. The observed record ends at the latest complete growing season shared by every published region.

Compare regions

Observed record

Historical trends, 1991–2025

Growing degree days changed +113.2 GDD per decade. The 95% interval is +77.1 to +149.2 GDD per decade, based on 35 eligible vintages.

How it is measured: Across the April 1–October 31 growing season, each day's mean temperature above 10°C adds to the total; cooler days add zero.

Growing degree days · annual change from the 1991–2020 average1991–2025

Scroll horizontally to inspect the full timeline.

View annual growing degree days data
VintageGrowing degree daysChange from 1991–2020
19911736 GDD-145 GDD
19921631 GDD-251 GDD
19931666 GDD-215 GDD
19941773 GDD-109 GDD
19951695 GDD-186 GDD
19961624 GDD-258 GDD
19971870 GDD-11 GDD
19981876 GDD-6 GDD
19991915 GDD+33 GDD
20001878 GDD-3 GDD
20011901 GDD+20 GDD
20021697 GDD-184 GDD
20032225 GDD+344 GDD
20041838 GDD-44 GDD
20051884 GDD+3 GDD
20062009 GDD+128 GDD
20071922 GDD+41 GDD
20081797 GDD-85 GDD
20092029 GDD+147 GDD
20101750 GDD-132 GDD
20112064 GDD+182 GDD
20121892 GDD+11 GDD
20131837 GDD-44 GDD
20141847 GDD-35 GDD
20151951 GDD+70 GDD
20161909 GDD+28 GDD
20172090 GDD+208 GDD
20182128 GDD+246 GDD
20192024 GDD+143 GDD
20201984 GDD+103 GDD
20211965 GDD+84 GDD
20222408 GDD+527 GDD
20232256 GDD+375 GDD
20241941 GDD+59 GDD
20251982 GDD+100 GDD
Growing-season mean temperature
+0.56 °C per decade 95% interval +0.39 to +0.73
Growing degree days
+113.16 GDD per decade 95% interval +77.15 to +149.18
Growing-season precipitation
-13.81 mm per decade 95% interval -60.19 to +32.58
Hot days
+1.43 days per decade 95% interval +0.18 to +2.67
Spring frost days
-0.60 days per decade 95% interval -1.36 to +0.16
Longest dry spell
-0.93 days per decade 95% interval -1.98 to +0.13

Last Updated August 20, 2026

Model ensemble

Projected climate through 2075

Temperature changes are relative to each model’s 1991–2020 baseline. The table combines all three pathways, weighted 70% to SSP2-4.5 and 15% each to SSP1-2.6 and SSP3-7.0.

Scroll horizontally to compare all columns.

PeriodWeighted medianWeighted central 80%Models per pathway
2021-2040+1.2°C+0.8 to +1.7°C25
2041-2060+1.9°C+1.3 to +2.6°C25
2061-2075+2.3°C+1.7 to +3.6°C25
How pathways are combined

For each period and percentile, Weather & Vines takes 70% of the SSP2-4.5 value, 15% of the SSP1-2.6 value, and 15% of the SSP3-7.0 value. Each pathway contains the same 25 models. The weights are an editorial view of the current trajectory, not scenario probabilities.

Last Updated June 29, 2025

Compare projection measures across regions

Typical year · 1991–2020

When to visit

This calendar describes typical regional weather under the selected climate baseline. It is not a forecast for a future trip, and it does not account for crowds, lodging, events, or vineyard access.

Deterministic IFS forecast

Next ten days

Detailed forecast outlook

ECMWF IFS 0.25° via Herbie · model run Aug 30, 2026 at 00:00 UTC · retrieved Aug 30, 2026 at 08:22 UTC

Scroll horizontally to see all forecast dates.

DateSunMonTueWedThuFriSatSunMonTue
High 32°C 32°C 31°C 32°C 33°C 35°C 33°C 33°C 33°C 30°C
Low 19°C 20°C 20°C 20°C 20°C 21°C 22°C 22°C 22°C 22°C
Rain 0.0 mm 0.3 mm 0.0 mm 0.0 mm 0.0 mm 0.0 mm 0.0 mm 0.0 mm 0.1 mm 1.8 mm

Across the typical year: Late July has the warmest median afternoon high (29.4°C); Late December has the coolest (6.6°C). Wet days are most frequent in Early May (58%) and least frequent in Late January (26%). Ties are resolved by calendar order.

Typical afternoon highs and overnight lowsMedians and middle 50% of daily readings

Afternoon highOvernight lowMiddle 50%

Scroll horizontally to inspect all 24 half-month periods.

Typical afternoon highs and overnight lows for Piedmont Median daily maximum and minimum temperatures for 24 early and late-month periods under the 1991–2020 baseline. Neutral bands show the 25th to 75th percentile. -5°C5°C15°C25°C35°C JanFebMarAprMayJunJulAugSepOctNovDec
How often a day is wetShare of days with at least 1 mm of rain

Scroll horizontally to inspect all 24 half-month periods.

Wet-day frequency through the typical year for Piedmont The fraction of days receiving at least one millimeter of rain in each early and late-month period under the 1991–2020 baseline. 0%25%50%75%100% JanFebMarAprMayJunJulAugSepOctNovDec
View all 24 periods as a table

Scroll horizontally to view all columns.

Piedmont typical weather by half-month, 1991–2020
PeriodAfternoon high, median (middle 50%)Overnight low, median (middle 50%)Wet-day frequencyPeriod rain, median (middle 50%)
Jan 1–156.7°C (4.2–9.0°C)-0.0°C (-1.8–1.9°C)27%20.4 mm (3.3–58.6 mm)
Jan 16–316.9°C (4.5–9.2°C)-0.4°C (-2.3–1.2°C)26%23.1 mm (12.3–34.7 mm)
Feb 1–158.7°C (5.8–11.4°C)0.4°C (-1.5–2.6°C)26%24.2 mm (3.0–40.8 mm)
Feb 16–2910.1°C (7.3–12.7°C)1.5°C (-0.4–3.6°C)30%25.2 mm (5.5–45.9 mm)
Mar 1–1512.8°C (9.6–16.0°C)3.3°C (1.2–5.7°C)28%29.2 mm (14.2–58.9 mm)
Mar 16–3115.1°C (12.5–18.0°C)5.9°C (3.7–7.9°C)32%40.3 mm (12.3–56.3 mm)
Apr 1–1517.0°C (13.5–19.2°C)7.6°C (5.8–9.1°C)42%37.9 mm (19.9–67.9 mm)
Apr 16–3018.1°C (15.5–21.1°C)9.6°C (7.8–11.3°C)48%56.8 mm (27.7–86.3 mm)
May 1–1520.8°C (17.7–22.8°C)12.0°C (10.3–13.4°C)58%61.8 mm (29.6–89.2 mm)
May 16–3122.8°C (20.4–25.1°C)13.9°C (12.0–15.2°C)46%48.2 mm (22.0–74.3 mm)
Jun 1–1524.5°C (22.1–26.8°C)15.6°C (14.0–17.3°C)54%58.8 mm (40.4–88.6 mm)
Jun 16–3027.2°C (24.9–29.6°C)17.5°C (15.8–19.6°C)39%31.3 mm (16.9–45.8 mm)
Jul 1–1528.3°C (26.2–30.2°C)18.7°C (16.9–20.1°C)46%37.0 mm (26.5–55.4 mm)
Jul 16–3129.4°C (27.6–31.0°C)19.4°C (17.9–20.7°C)35%26.3 mm (16.7–37.4 mm)
Aug 1–1528.9°C (27.1–30.6°C)19.1°C (17.6–20.5°C)44%41.3 mm (28.3–56.3 mm)
Aug 16–3127.9°C (25.8–30.0°C)18.4°C (16.8–20.0°C)39%39.1 mm (21.8–60.7 mm)
Sep 1–1525.1°C (22.8–27.1°C)15.6°C (14.0–17.4°C)38%38.1 mm (29.4–74.0 mm)
Sep 16–3022.1°C (19.6–24.0°C)13.7°C (11.7–15.3°C)40%43.8 mm (29.3–94.4 mm)
Oct 1–1519.2°C (16.5–21.2°C)11.6°C (9.8–13.6°C)45%60.5 mm (27.7–94.3 mm)
Oct 16–3115.8°C (13.7–18.1°C)8.8°C (6.7–10.9°C)35%46.8 mm (26.4–71.7 mm)
Nov 1–1513.1°C (11.0–14.9°C)6.7°C (4.5–8.9°C)43%79.3 mm (27.8–105.9 mm)
Nov 16–309.8°C (8.0–11.6°C)3.2°C (0.4–6.1°C)34%42.1 mm (9.2–90.2 mm)
Dec 1–158.1°C (6.1–9.9°C)0.8°C (-0.9–3.1°C)29%24.0 mm (7.4–52.5 mm)
Dec 16–316.6°C (4.4–8.8°C)-0.2°C (-1.9–1.9°C)28%29.6 mm (8.9–55.4 mm)

Each year contributes to temperature or rain separately when at least 90% of that period’s days are present. A value is shown only when at least 80% of the baseline years qualify. February 29 is included in late February.

Historical climatology Last Updated August 20, 2026

Season to date

Growing season heat and rainfall

Apr 1–Aug 30, 2026

Growing degree days1738.3base 10°C
Growing-season rainfall250.8 mmweighted regional total
Cumulative growing degree daysBase 10°C

2026 season1991–2020 average

Growing degree days accumulated during the 2026 growing season The solid line accumulates daily mean temperature above 10 degrees Celsius from the configured growing-season start. The dashed line shows the 1991–2020 daily climatological average. 1738 GDD 0 Apr ’26MayJunJulAug
Cumulative growing-season rainfallRegional weighted mean

2026 season1991–2020 average

Rainfall accumulated during the 2026 growing season The solid line accumulates daily rainfall in millimeters from the configured growing-season start. The dashed line shows the 1991–2020 daily climatological average. 474 mm 0 Apr ’26MayJunJulAug
View growing-season accumulation data
DateSeason GDD1991–2020 average GDDSeason rainfall1991–2020 average rainfall
2026-04-010.01.90.1 mm2.3 mm
2026-04-020.34.00.1 mm5.1 mm
2026-04-033.46.20.1 mm8.2 mm
2026-04-048.18.20.1 mm13.2 mm
2026-04-0514.010.10.3 mm16.7 mm
2026-04-0620.912.90.3 mm17.5 mm
2026-04-0727.115.30.3 mm20.2 mm
2026-04-0834.217.80.3 mm22.0 mm
2026-04-0940.520.10.4 mm24.8 mm
2026-04-1046.622.40.4 mm28.6 mm
2026-04-1151.924.50.6 mm33.4 mm
2026-04-1255.427.22.5 mm36.7 mm
2026-04-1357.229.925.7 mm39.0 mm
2026-04-1461.132.531.4 mm41.3 mm
2026-04-1566.835.032.3 mm44.7 mm
2026-04-1673.437.432.4 mm49.6 mm
2026-04-1781.040.032.7 mm53.0 mm
2026-04-1889.743.033.1 mm56.0 mm
2026-04-1998.045.838.0 mm60.5 mm
2026-04-20103.948.839.8 mm64.9 mm
2026-04-21109.252.349.6 mm68.3 mm
2026-04-22112.056.754.9 mm69.9 mm
2026-04-23116.360.954.9 mm73.4 mm
2026-04-24122.165.654.9 mm76.9 mm
2026-04-25128.570.254.9 mm81.1 mm
2026-04-26135.975.054.9 mm85.5 mm
2026-04-27144.179.655.0 mm93.8 mm
2026-04-28151.183.856.7 mm99.2 mm
2026-04-29158.288.358.0 mm104.3 mm
2026-04-30162.592.760.3 mm109.7 mm
2026-05-01166.997.660.3 mm114.6 mm
2026-05-02172.8102.760.3 mm121.3 mm
2026-05-03178.7108.260.3 mm127.0 mm
2026-05-04184.6113.561.2 mm135.3 mm
2026-05-05187.3118.872.0 mm139.9 mm
2026-05-06192.7124.384.5 mm143.4 mm
2026-05-07198.1130.285.2 mm144.8 mm
2026-05-08203.2136.886.6 mm147.8 mm
2026-05-09209.6143.386.7 mm151.3 mm
2026-05-10214.0149.792.6 mm155.7 mm
2026-05-11220.7156.396.5 mm162.3 mm
2026-05-12226.2163.196.9 mm166.4 mm
2026-05-13230.3170.097.4 mm169.3 mm
2026-05-14233.8177.1101.1 mm172.3 mm
2026-05-15233.8183.7107.3 mm176.9 mm
2026-05-16236.5190.5107.4 mm180.5 mm
2026-05-17240.7197.6107.5 mm184.7 mm
2026-05-18245.5204.8109.4 mm190.5 mm
2026-05-19250.1211.9109.8 mm195.1 mm
2026-05-20258.2219.0110.2 mm199.3 mm
2026-05-21268.5226.0110.2 mm203.2 mm
2026-05-22279.8233.9110.2 mm205.5 mm
2026-05-23292.2242.5110.2 mm208.7 mm
2026-05-24306.0251.3110.3 mm210.1 mm
2026-05-25320.8260.5110.3 mm211.8 mm
2026-05-26336.0269.6110.3 mm214.4 mm
2026-05-27351.7278.7110.3 mm218.8 mm
2026-05-28367.4287.8111.8 mm223.0 mm
2026-05-29381.1296.9116.7 mm226.9 mm
2026-05-30395.0306.1116.7 mm229.7 mm
2026-05-31408.8315.0117.5 mm234.0 mm
2026-06-01421.7324.1119.1 mm239.0 mm
2026-06-02431.5333.6134.0 mm241.9 mm
2026-06-03442.1343.3134.2 mm244.8 mm
2026-06-04451.2353.2141.8 mm249.0 mm
2026-06-05460.5363.0144.2 mm255.1 mm
2026-06-06470.5372.6148.6 mm259.1 mm
2026-06-07482.0382.3149.0 mm264.9 mm
2026-06-08495.2392.4149.0 mm267.8 mm
2026-06-09507.3402.8151.8 mm272.3 mm
2026-06-10518.3413.2158.4 mm277.4 mm
2026-06-11528.5423.6158.4 mm282.9 mm
2026-06-12539.1434.2158.4 mm286.3 mm
2026-06-13552.9444.8158.4 mm290.6 mm
2026-06-14565.8455.2158.5 mm295.3 mm
2026-06-15579.0466.1158.9 mm299.2 mm
2026-06-16592.9477.4158.9 mm303.2 mm
2026-06-17608.5488.5159.0 mm306.7 mm
2026-06-18624.9500.3159.1 mm307.9 mm
2026-06-19642.0512.1159.7 mm312.0 mm
2026-06-20659.7524.0160.1 mm314.6 mm
2026-06-21677.9536.2160.6 mm316.1 mm
2026-06-22696.8548.7161.0 mm318.0 mm
2026-06-23715.6561.0161.2 mm320.7 mm
2026-06-24733.7573.5164.1 mm322.3 mm
2026-06-25751.4586.1166.7 mm324.4 mm
2026-06-26769.9598.8168.1 mm326.7 mm
2026-06-27789.4611.8168.6 mm330.2 mm
2026-06-28810.2624.6169.1 mm332.8 mm
2026-06-29829.1637.5170.3 mm336.0 mm
2026-06-30845.8650.7171.6 mm337.1 mm
2026-07-01860.6664.0178.2 mm339.2 mm
2026-07-02874.2677.2178.2 mm342.2 mm
2026-07-03889.3690.6178.2 mm344.2 mm
2026-07-04905.5703.8178.2 mm346.5 mm
2026-07-05922.2717.2178.2 mm348.7 mm
2026-07-06938.6730.5178.4 mm351.5 mm
2026-07-07955.0743.7178.4 mm355.5 mm
2026-07-08973.3756.9178.4 mm357.6 mm
2026-07-09991.1769.8178.4 mm359.2 mm
2026-07-101008.3782.8180.3 mm362.4 mm
2026-07-111025.1795.9183.5 mm366.0 mm
2026-07-121041.1809.2183.5 mm368.4 mm
2026-07-131057.5822.5183.6 mm371.2 mm
2026-07-141075.3835.8184.1 mm373.7 mm
2026-07-151092.0849.1184.6 mm377.9 mm
2026-07-161107.3862.7185.5 mm379.7 mm
2026-07-171123.5876.4189.1 mm382.5 mm
2026-07-181140.9890.1190.9 mm384.5 mm
2026-07-191157.4904.1191.9 mm386.2 mm
2026-07-201173.2918.3192.5 mm387.7 mm
2026-07-211188.6932.4196.7 mm389.6 mm
2026-07-221202.8946.8196.8 mm391.1 mm
2026-07-231216.8961.1197.1 mm393.2 mm
2026-07-241231.1975.1197.1 mm396.5 mm
2026-07-251244.6989.6197.4 mm397.8 mm
2026-07-261258.71004.2200.1 mm398.8 mm
2026-07-271274.51018.7200.1 mm400.4 mm
2026-07-281290.91033.3200.1 mm402.9 mm
2026-07-291309.51047.7200.1 mm405.8 mm
2026-07-301329.01062.4200.1 mm406.6 mm
2026-07-311347.91076.7200.9 mm408.7 mm
2026-08-011366.31091.2201.6 mm410.6 mm
2026-08-021384.31105.7204.8 mm412.6 mm
2026-08-031403.21120.1206.2 mm415.3 mm
2026-08-041421.71134.6207.5 mm419.1 mm
2026-08-051440.51149.0208.0 mm422.7 mm
2026-08-061460.01163.6208.5 mm425.5 mm
2026-08-071477.81178.1210.0 mm427.4 mm
2026-08-081494.71192.2210.3 mm432.1 mm
2026-08-091512.21205.9211.7 mm435.3 mm
2026-08-101529.21219.5211.7 mm440.2 mm
2026-08-111547.21232.9212.5 mm442.7 mm
2026-08-121565.51246.0212.9 mm446.4 mm
2026-08-131584.91259.3213.2 mm448.6 mm
2026-08-141603.81272.5213.6 mm452.5 mm
2026-08-151621.61285.6213.8 mm455.4 mm
2026-08-161639.51298.7216.0 mm458.0 mm
2026-08-171654.71312.0216.2 mm460.3 mm
2026-08-181671.31325.7216.2 mm462.1 mm
2026-08-191688.11339.5218.7 mm464.3 mm
2026-08-201702.51353.1228.8 mm468.1 mm
2026-08-211713.51366.5249.8 mm470.5 mm
2026-08-221725.71380.0249.9 mm472.0 mm
2026-08-231738.31393.4250.8 mm474.1 mm

Forecast outlook

ECMWF IFS 0.25° via Herbie · run Aug 30, 2026 at 00:00 UTC

10-day totals compared with the 1991–2020 combined regional record

GDD accumulation
158 GDDvs 107 GDD average
Total rainfall
2.3 mmvs 32.9 mm average

The forecast includes a period of potentially stressful heat. The region's 34°C heat threshold is reached Sep 4.

Sun8/30 32°Cavg 26°C 19°Cavg 17°C +15 GDD 0.0 mm
Mon8/31 32°Cavg 26°C 20°Cavg 16°C +15 GDD 0.3 mm
Tue9/1 31°Cavg 25°C 20°Cavg 16°C +15 GDD 0.0 mm
Wed9/2 32°Cavg 25°C 20°Cavg 16°C +15 GDD 0.0 mm
Thu9/3 33°Cavg 25°C 20°Cavg 16°C +16 GDD 0.0 mm
Fri9/4 35°Cavg 25°C 21°Cavg 16°C +17 GDD 0.0 mm
Sat9/5 33°Cavg 26°C 22°Cavg 16°C +16 GDD 0.0 mm
Sun9/6 33°Cavg 25°C 22°Cavg 15°C +16 GDD 0.0 mm
Mon9/7 33°Cavg 25°C 22°Cavg 16°C +16 GDD 0.1 mm
Tue9/8 30°Cavg 25°C 22°Cavg 16°C +15 GDD 1.8 mm

Data and methods

Show data sources and model assumptions

Current model conditions and the 10-day outlook use the 00 UTC deterministic ECMWF IFS 0.25° public forecast retrieved directly with Herbie. Historical temperature and rain combine qualifying GHCN-D stations with ERA5 by geographic area; a missing station day uses the nearest ERA5 value for that station's area. Climate comparisons use 1991–2020.

Forecast comparisons use the 1991–2020 combined regional daily record. Daily high and low averages use the matching date; rainfall and GDD sum the same calendar dates as the forecast period.

This service is based on data and products of the European Centre for Medium-Range Weather Forecasts (ECMWF). Weather & Vines subsets, converts, and regionally weights the forecast fields. ECMWF data are published under CC BY 4.0. ECMWF accepts no liability for errors, omissions, availability, loss, or damage arising from their use.

Climate projections use NASA NEX-GDDP-CMIP6 v2.0, accessed August 23, 2026, with 25 models. Weather & Vines subsets and aggregates the source fields. Source files and derived projection data are under CC BY-SA 4.0; the full roster and limitations are listed in the climate atlas methods.

Region outline: Istituto nazionale di statistica (Istat), 2026; reprojected and simplified by Weather & Vines; CC BY 4.0. This is a statistical administrative boundary, not a wine-denomination boundary.

The Piedmont model uses a April 1–October 31 growing season, base 10°C GDD, and an operational hot-day marker of 34°C.

The historical series uses 3 ERA5 locations, 1 temperature station, and 2 rain stations. Interpretation confidence: high. Geometry confidence: authoritative. Rules: piedmont-v4-2026-08.