Gualeguay climate — normals and trends
Gualeguay (Argentina) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 17.8 °C and it receives 1,050 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is January (25.0 °C on average) and the coldest is July (11.0 °C). Rainfall peaks in March.
Gualeguay averages 4 frost days, 59 hot days (≥ 30 °C) and 89 rainy days per year.
No statistically significant temperature trend emerges for Gualeguay between 1940 and 2025: over this span, year-to-year swings outweigh the climate signal.
The hottest day of the period reached 41.6 °C (on 11 January 1957) and the coldest -5.8 °C (on 14 June 1967).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
GualeguayEntre Rios
- coords
- -33.14°, -59.31°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.8°C
Average daily high
23.3°C
Average daily low
12.8°C
Annual rainfall
1,050mm
Sunshine / day
9.4h
Mean relative humidity
72%
Average peak wind
17.1km/h
Seasonal range
14.0°C
Frost days (< 0 °C)
4 d/yr
Hot days (≥ 30 °C)
59 d/yr
Rainy days (≥ 1 mm)
89 d/yr
Annual snowfall
0.0 cm
Average feels-like high
23.4 °C
Average feels-like low
11.6 °C
Average peak gust
33.5 km/h
Tropical nights (≥ 20 °C)
41 d/yr
Solar radiation
17.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
No clear trend over this period
Over a short window, year-to-year swings outweigh the climate signal. Try 86 years.
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
41.6 °C
11 January 1957
Coldest day
-5.8 °C
14 June 1967
Wettest day
156 mm
12 April 1959
Windiest day
50.6 km/h
29 May 1984
Strongest gust
94.0 km/h
17 October 1982
Hottest feels-like
44.3 °C
26 December 2013
Coldest feels-like
-9.8 °C
14 June 1967
Snowiest day
0.7 cm
7 July 1960
Sunniest day
14.0 h
3 January 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 33.6 °C | +2.9 °C | 58 mm | -45 mm |
| Feb | 31.2 °C | +1.8 °C | 161 mm | +54 mm |
| Mar | 27.6 °C | +0.5 °C | 122 mm | -4 mm |
| Apr | 23.0 °C | -0.2 °C | 58 mm | -37 mm |
| May | 21.0 °C | +1.5 °C | 117 mm | +40 mm |
| Jun | 15.6 °C | -0.7 °C | 19 mm | -34 mm |
| Jul | 17.2 °C | +1.1 °C | 53 mm | -5 mm |
| Aug | 18.7 °C | +0.7 °C | 132 mm | +67 mm |
| Sep | 21.0 °C | +0.9 °C | 79 mm | -0 mm |
| Oct | 25.2 °C | +2.2 °C | 52 mm | -52 mm |
| Nov | 26.7 °C | +0.4 °C | 120 mm | +26 mm |
| Dec | 32.5 °C | +3.2 °C | 35 mm | -56 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Gualeguay?
Gualeguay has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.8 °C and it receives 1,050 mm of precipitation per year.
What is the hottest day ever recorded in Gualeguay?
The hottest day measured in Gualeguay between 1940 and 2025 was 11 January 1957, reaching 41.6 °C.
What is the coldest day in Gualeguay?
The coldest day measured in Gualeguay between 1940 and 2025 was 14 June 1967, at -5.8 °C.
Does it snow in Gualeguay?
Almost never: Gualeguay sees virtually no snow, with about 4 frost days per year.
Has the climate of Gualeguay warmed?
Between 1940 and 2025, no statistically significant temperature trend emerges in Gualeguay.
What is the wettest day in Gualeguay?
The wettest day measured in Gualeguay between 1940 and 2025 was 12 April 1959, with 156 mm of rain in 24 hours.
What was the windiest day in Gualeguay?
The windiest day measured in Gualeguay between 1940 and 2025 was 29 May 1984, with winds reaching 50.6 km/h.
What is the warmest month in Gualeguay?
The warmest month in Gualeguay is January (25.0 °C on average); the coldest is July (11.0 °C).
How much does it rain in Gualeguay?
Gualeguay receives on average 1,050 mm of precipitation per year, spread over about 89 rainy days.
Is it sunny in Gualeguay?
Gualeguay gets on average 9.4 hours of sunshine per day, roughly 3,431 hours per year over 1940-2025.
What is the biggest single-day snowfall in Gualeguay?
The heaviest 24-hour snowfall measured in Gualeguay between 1940 and 2025 was 7 July 1960, with 0.7 cm.
Are there tropical nights in Gualeguay?
Yes: Gualeguay has on average 41 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Gualeguay?
In Gualeguay, between 1940 and 2025, the highest apparent temperature reached 44.3 °C on 26 December 2013, and the lowest was -9.8 °C on 14 June 1967.
Compare Gualeguay with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Gualeguay