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Argentina · Multi-region weather view

Mendoza

Mendoza's principal wine areas, from Luján de Cuyo and Maipú south through the Uco Valley and east toward San Martín and Santa Rosa.

The Andes rain shadow makes the season dry, but elevation separates cooler Uco Valley sites from the warmer eastern plain. Spring frost, hail, summer heat and the timing of scarce rain are the main weather signals.

Climate comparisons use the 1991–2020 combined regional record · updated through Sep 13, 2026.

Current conditions

Observations through Sep 21, 2026 · 03:00 UTC

Temperature15.4°C
Dew Point-4.6°C
Relative Humidity25%
24h Rainfall1.0 mmmodeled IFS total through Sep 20

Vintage explorer

Compare this vintage · View 1994 across regions →

Slightly warmer and slightly wetter than normal.

Mean temperature16.6°C
Temperature anomaly+0.3°Cvs 1991-2020
Growing degree days1631base 10°C
Hot days0≥ 35°C

What stood out in 1994

A freeze after budbreak can damage new growth and reduce the crop.

Spring freeze recorded · Moderate confidence

The regional record had 2 spring day(s) at or below -2°C.

A freeze after budbreak can damage new growth and reduce the crop.

How unusual was 1994?

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

Growing-season temperature

15th warmest of 35 vintages Warmer than 19 of 34 other vintages 16.6°C

Growing-season rainfall

15th wettest of 35 vintages Wetter than 20 of 34 other vintages 699.9 mm

Heat accumulation

18th highest of 35 vintages Higher than 17 of 34 other vintages 1632 GDD

Hot days

5th most of 35 vintages More than 0 of 34 other vintages 0 days

1994 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. 1–30
    Frost watchGrowing season

    Heat accumulation

    1994 69 GDD
    Typical 43 GDD

    Rainfall

    1994 39.9 mm
    Typical 50.4 mm
    1994 freezing days
    4
    Typical
    3.9

    Heat accumulation ran ahead of the typical month.

  2. 1–31
    Frost watchGrowing season

    Heat accumulation

    1994 100 GDD
    Typical 121 GDD

    Rainfall

    1994 137.1 mm
    Typical 72.8 mm
    1994 freezing days
    0
    Typical
    0.3

    Wetter than the typical month.

  3. 1–30
    Frost watchGrowing season

    Heat accumulation

    1994 232 GDD
    Typical 209 GDD

    Rainfall

    1994 59.7 mm
    Typical 86.2 mm
    1994 freezing days
    0
    Typical
    0.0

    Close to the typical monthly pattern.

  4. 1–31
    Growing season

    Heat accumulation

    1994 364 GDD
    Typical 299 GDD

    Rainfall

    1994 98.6 mm
    Typical 103.1 mm

    Heat accumulation ran ahead of the typical month.

  5. 1–31
    Growing seasonHarvest window

    Heat accumulation

    1994 315 GDD
    Typical 338 GDD

    Rainfall

    1994 110.8 mm
    Typical 112.3 mm

    Close to the typical monthly pattern.

  6. 1–28
    Growing seasonHarvest window

    Heat accumulation

    1994 230 GDD
    Typical 268 GDD

    Rainfall

    1994 126.1 mm
    Typical 101.9 mm

    Close to the typical monthly pattern.

  7. 1–31
    Growing seasonHarvest window

    Heat accumulation

    1994 216 GDD
    Typical 224 GDD

    Rainfall

    1994 90.6 mm
    Typical 103.6 mm

    Close to the typical monthly pattern.

  8. 1–30
    Growing seasonHarvest window

    Heat accumulation

    1994 105 GDD
    Typical 97 GDD

    Rainfall

    1994 37.0 mm
    Typical 68.0 mm

    Drier than the typical month.

View milestone calendar data as a table
Month1994 GDDTypical GDD1994 rainfallTypical rainfall1994 freezing daysTypical freezing days
September 1994 69 GDD 43 GDD 39.9 mm 50.4 mm 43.9
October 1994 100 GDD 121 GDD 137.1 mm 72.8 mm 00.3
November 1994 232 GDD 209 GDD 59.7 mm 86.2 mm 00.0
December 1994 364 GDD 299 GDD 98.6 mm 103.1 mm Outside frost windowOutside frost window
January 1995 315 GDD 338 GDD 110.8 mm 112.3 mm Outside frost windowOutside frost window
February 1995 230 GDD 268 GDD 126.1 mm 101.9 mm Outside frost windowOutside frost window
March 1995 216 GDD 224 GDD 90.6 mm 103.6 mm Outside frost windowOutside frost window
April 1995 105 GDD 97 GDD 37.0 mm 68.0 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 Sep 13, 2026.

Replay the 1994 growing season

242 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 Sep 12, 2026.

The daily weather replay is complete, but the separate weather-event scan is not currently available for this vintage.

Closest weather matches

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

  1. Closest match

    1996

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

    Hot-day count
    the same: 0 days
    Growing degree days
    higher: 5 GDD

    Largest difference: Growing-season precipitation — more rain

    View 1996 →

  2. Second closest

    2025

    Most alike in Hot-day count and Growing-season precipitation.

    Hot-day count
    the same: 0 days
    Growing-season precipitation
    less rain: 35.6 mm

    Largest difference: Growing-season mean temperature — warmer

    View 2025 →

  3. Third closest

    2018

    Most alike in Hot-day count and Growing-season mean temperature.

    Hot-day count
    the same: 0 days
    Growing-season mean temperature
    the same: 0.0°C

    Largest difference: Harvest precipitation — less rain

    View 2018 →
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: 1996 0.274; 2025 0.385; 2018 0.469.

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. +9.9°C −9.9°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. +680 mm −680 mm 1991 2000 2010 2020 2026
View historical chart data as a table
YearTemperature anomalyRainfall anomalyHot days
1991-0.6°C+274 mm0
1992-0.6°C+245 mm0
1993-0.6°C+17 mm0
1994+0.3°C+2 mm0
1995-0.2°C+9 mm0
1996+0.2°C+72 mm0
1997-1.1°C+391 mm0
1998-0.6°C+73 mm0
1999-0.8°C+328 mm0
2000-0.4°C+23 mm0
2001-0.8°C+154 mm0
2002+0.2°C-41 mm1
2003+0.8°C-148 mm0
2004-0.7°C+21 mm0
2005+0.0°C-181 mm1
2006+0.1°C+3 mm0
2007+0.1°C-107 mm0
2008+0.9°C-201 mm0
2009+0.2°C-181 mm0
2010-0.2°C-123 mm0
2011+0.9°C-216 mm0
2012+0.3°C-93 mm0
2013-0.1°C-99 mm0
2014+0.8°C+20 mm0
2015-1.2°C+432 mm0
2016+0.7°C-49 mm0
2017+0.7°C-202 mm0
2018+0.3°C-99 mm0
2019+1.2°C-180 mm0
2020+0.4°C-143 mm0
2021+0.4°C-178 mm0
2022+1.1°C-247 mm0
2023+1.1°C-60 mm1
2024+1.5°C-209 mm2
2025+0.6°C-34 mm0
2026-9.7°C-672 mm0

winter

6.2°C

+0.5°C vs baseline

138 mm rain · +18 mm

spring

14.1°C

+0.6°C vs baseline

236 mm rain · +27 mm

summer

20.1°C

+0.1°C vs baseline

335 mm rain · +18 mm

harvest

16.8°C

-0.4°C vs baseline

303 mm rain · -33 mm

Weather events

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 +95.3 GDD per decade. The 95% interval is +66.6 to +124.0 GDD per decade, based on 35 eligible vintages.

How it is measured: Across the September 1–April 30 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
19911459 GDD-140 GDD
19921473 GDD-126 GDD
19931492 GDD-108 GDD
19941632 GDD+33 GDD
19951543 GDD-56 GDD
19961637 GDD+37 GDD
19971326 GDD-273 GDD
19981487 GDD-112 GDD
19991391 GDD-209 GDD
20001562 GDD-37 GDD
20011415 GDD-184 GDD
20021622 GDD+23 GDD
20031779 GDD+180 GDD
20041447 GDD-152 GDD
20051660 GDD+60 GDD
20061590 GDD-9 GDD
20071612 GDD+13 GDD
20081807 GDD+208 GDD
20091680 GDD+81 GDD
20101522 GDD-77 GDD
20111812 GDD+213 GDD
20121634 GDD+35 GDD
20131630 GDD+31 GDD
20141750 GDD+151 GDD
20151363 GDD-236 GDD
20161749 GDD+150 GDD
20171741 GDD+142 GDD
20181605 GDD+6 GDD
20191899 GDD+300 GDD
20201657 GDD+58 GDD
20211653 GDD+53 GDD
20221835 GDD+236 GDD
20231837 GDD+238 GDD
20241902 GDD+303 GDD
20251726 GDD+127 GDD
Growing-season mean temperature
+0.44 °C per decade 95% interval +0.31 to +0.58
Growing degree days
+95.31 GDD per decade 95% interval +66.57 to +124.05
Growing-season precipitation
-94.74 mm per decade 95% interval -137.51 to -51.97
Hot days
+0.11 days per decade 95% interval -0.07 to +0.28
Spring frost days
-0.50 days per decade 95% interval -1.03 to +0.03
Longest dry spell
+1.10 days per decade 95% interval -0.15 to +2.36

Last Updated September 13, 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+0.7°C+0.5 to +1.1°C25
2041-2060+1.3°C+0.9 to +1.8°C25
2061-2075+1.6°C+1.2 to +2.4°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 Sep 20, 2026 at 00:00 UTC · retrieved Sep 21, 2026 at 03:20 UTC

Scroll horizontally to see all forecast dates.

DateMonTueWedThuFriSatSunMonTue
High 17°C 18°C 25°C 28°C 25°C 30°C 24°C 15°C 12°C
Low 11°C 5°C 8°C 14°C 15°C 13°C 17°C 11°C 8°C
Rain 0.0 mm 0.0 mm 0.0 mm 0.2 mm 0.0 mm 0.0 mm 0.0 mm 0.2 mm 6.2 mm

Across the typical year: Late December has the warmest median afternoon high (27.3°C); Early July has the coolest (10.4°C). Wet days are most frequent in Late January (72%) and least frequent in Early June (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 Mendoza 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°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 Mendoza 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.

Mendoza 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 1–1526.9°C (24.8–29.1°C)15.3°C (13.6–16.7°C)71%45.7 mm (32.8–66.9 mm)
Jan 16–3126.8°C (24.6–28.9°C)15.1°C (13.6–16.6°C)72%60.0 mm (42.3–73.6 mm)
Feb 1–1526.0°C (23.3–27.7°C)14.4°C (12.9–15.9°C)72%53.0 mm (32.0–75.9 mm)
Feb 16–2925.5°C (22.5–27.9°C)13.7°C (11.7–15.5°C)66%42.8 mm (19.3–56.7 mm)
Mar 1–1523.8°C (21.5–26.5°C)13.1°C (11.3–14.5°C)64%52.8 mm (39.7–71.8 mm)
Mar 16–3122.2°C (18.9–24.5°C)10.7°C (9.0–12.8°C)55%48.7 mm (23.5–61.8 mm)
Apr 1–1519.7°C (16.5–22.0°C)8.7°C (6.6–10.4°C)48%38.5 mm (20.7–58.6 mm)
Apr 16–3017.9°C (15.0–20.3°C)6.6°C (4.2–8.4°C)34%24.6 mm (13.8–35.6 mm)
May 1–1516.0°C (13.1–18.3°C)5.1°C (3.5–6.8°C)33%19.2 mm (9.3–34.4 mm)
May 16–3112.9°C (10.0–15.4°C)2.5°C (0.7–4.5°C)36%24.8 mm (16.8–31.6 mm)
Jun 1–1512.1°C (9.1–14.2°C)1.0°C (-1.1–2.7°C)26%18.1 mm (9.1–30.0 mm)
Jun 16–3010.7°C (8.0–12.9°C)0.0°C (-2.1–1.8°C)29%17.5 mm (9.3–24.5 mm)
Jul 1–1510.4°C (7.3–13.1°C)-0.4°C (-2.6–1.3°C)26%16.2 mm (8.4–25.1 mm)
Jul 16–3110.4°C (7.9–13.0°C)-0.9°C (-3.1–1.2°C)26%12.7 mm (8.8–24.0 mm)
Aug 1–1512.3°C (9.0–15.0°C)0.2°C (-2.0–2.2°C)26%15.9 mm (10.3–24.0 mm)
Aug 16–3114.4°C (10.5–17.6°C)2.0°C (-0.3–3.9°C)28%17.4 mm (11.3–28.7 mm)
Sep 1–1515.2°C (11.6–17.9°C)3.1°C (1.0–5.2°C)36%24.3 mm (16.4–32.1 mm)
Sep 16–3017.4°C (14.1–20.5°C)5.0°C (2.8–7.0°C)31%20.7 mm (11.6–34.3 mm)
Oct 1–1519.0°C (15.8–21.9°C)6.6°C (4.5–8.6°C)41%29.6 mm (20.3–52.9 mm)
Oct 16–3121.2°C (17.9–23.8°C)8.4°C (6.6–10.2°C)43%34.2 mm (14.4–44.3 mm)
Nov 1–1523.1°C (19.6–25.9°C)10.1°C (8.2–11.7°C)48%33.8 mm (18.5–51.6 mm)
Nov 16–3024.4°C (21.7–27.0°C)11.1°C (9.5–13.1°C)54%44.5 mm (25.0–56.1 mm)
Dec 1–1525.2°C (22.6–27.4°C)12.3°C (10.6–13.8°C)62%39.7 mm (30.4–66.3 mm)
Dec 16–3127.3°C (24.9–29.4°C)14.7°C (12.7–16.2°C)61%35.4 mm (24.1–62.1 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 September 12, 2026

Season to date

Growing season heat and rainfall

Sep 1–Sep 20, 2026

Compare this season across regions →

Growing degree days4.3base 10°C
Growing-season rainfall25.9 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. 12 GDD 0 Sep ’26
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. 26 mm 0 Sep ’26
View growing-season accumulation data
DateSeason GDD1991–2020 average GDDSeason rainfall1991–2020 average rainfall
2026-09-010.50.60.0 mm1.6 mm
2026-09-024.30.90.7 mm2.6 mm
2026-09-034.31.53.8 mm3.9 mm
2026-09-044.32.54.3 mm5.3 mm
2026-09-054.33.67.0 mm8.1 mm
2026-09-064.34.67.2 mm10.3 mm
2026-09-074.35.57.2 mm12.3 mm
2026-09-084.36.47.2 mm14.5 mm
2026-09-094.37.48.1 mm17.5 mm
2026-09-104.38.78.6 mm19.1 mm
2026-09-114.39.618.4 mm20.3 mm
2026-09-124.310.825.9 mm21.8 mm
2026-09-134.311.525.9 mm23.4 mm

Forecast outlook

ECMWF IFS 0.25° via Herbie · run Sep 20, 2026 at 00:00 UTC

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

GDD accumulation
54 GDDvs 19 GDD average
Total rainfall
6.6 mmvs 16.6 mm average

No unusually hot or wet period stands out in the short-range forecast.

Mon9/21 17°Cavg 18°C 11°Cavg 5°C +4 GDD 0.0 mm
Tue9/22 18°Cavg 17°C 5°Cavg 5°C +1 GDD 0.0 mm
Wed9/23 25°Cavg 16°C 8°Cavg 5°C +6 GDD 0.0 mm
Thu9/24 28°Cavg 17°C 14°Cavg 4°C +10 GDD 0.2 mm
Fri9/25 25°Cavg 18°C 15°Cavg 5°C +10 GDD 0.0 mm
Sat9/26 30°Cavg 17°C 13°Cavg 5°C +10 GDD 0.0 mm
Sun9/27 24°Cavg 17°C 17°Cavg 5°C +10 GDD 0.0 mm
Mon9/28 15°Cavg 17°C 11°Cavg 5°C +3 GDD 0.2 mm
Tue9/29 12°Cavg 18°C 8°Cavg 6°C +0 GDD 6.2 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 September 20, 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.

The Mendoza model uses a September 1–April 30 growing season, base 10°C GDD, and an operational hot-day marker of 35°C.