Rojas climate — normals and trends
Rojas (Argentina) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.8 °C and it receives 921 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 (23.9 °C on average) and the coldest is July (9.7 °C). Rainfall peaks in March.
Rojas averages 8 frost days, 48 hot days (≥ 30 °C) and 89 rainy days per year.
No statistically significant temperature trend emerges for Rojas between 1940 and 2025: over this span, year-to-year swings outweigh the climate signal.
The hottest day of the period reached 40.9 °C (on 29 December 1971) and the coldest -7.3 °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
RojasBuenos Aires
- coords
- -34.20°, -60.73°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.8°C
Average daily high
22.5°C
Average daily low
11.7°C
Annual rainfall
921mm
Sunshine / day
9.5h
Mean relative humidity
71%
Average peak wind
18.6km/h
Seasonal range
14.2°C
Frost days (< 0 °C)
8 d/yr
Hot days (≥ 30 °C)
48 d/yr
Rainy days (≥ 1 mm)
89 d/yr
Annual snowfall
0.1 cm
Average feels-like high
22.1 °C
Average feels-like low
9.9 °C
Average peak gust
35.3 km/h
Tropical nights (≥ 20 °C)
24 d/yr
Solar radiation
17.4 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
40.9 °C
29 December 1971
Coldest day
-7.3 °C
14 June 1967
Wettest day
132 mm
22 October 1991
Windiest day
57.6 km/h
29 May 1984
Strongest gust
99.4 km/h
5 February 2017
Hottest feels-like
42.4 °C
15 January 2022
Coldest feels-like
-11.6 °C
14 June 1967
Snowiest day
2.4 cm
6 July 1960
Sunniest day
14.0 h
4 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 | 31.4 °C | +1.7 °C | 55 mm | -46 mm |
| Feb | 30.0 °C | +1.6 °C | 129 mm | +31 mm |
| Mar | 26.2 °C | -0.1 °C | 154 mm | +50 mm |
| Apr | 22.0 °C | -0.7 °C | 55 mm | -29 mm |
| May | 20.1 °C | +1.3 °C | 104 mm | +46 mm |
| Jun | 15.4 °C | -0.1 °C | 2 mm | -38 mm |
| Jul | 16.1 °C | +1.0 °C | 38 mm | -3 mm |
| Aug | 18.0 °C | +0.8 °C | 146 mm | +100 mm |
| Sep | 20.2 °C | +0.7 °C | 97 mm | +31 mm |
| Oct | 23.9 °C | +1.6 °C | 96 mm | -7 mm |
| Nov | 25.2 °C | -0.6 °C | 95 mm | +0 mm |
| Dec | 30.4 °C | +1.8 °C | 49 mm | -38 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 Rojas?
Rojas has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.8 °C and it receives 921 mm of precipitation per year.
What is the hottest day ever recorded in Rojas?
The hottest day measured in Rojas between 1940 and 2025 was 29 December 1971, reaching 40.9 °C.
What is the coldest day in Rojas?
The coldest day measured in Rojas between 1940 and 2025 was 14 June 1967, at -7.3 °C.
Does it snow in Rojas?
Almost never: Rojas sees virtually no snow, with about 8 frost days per year.
Has the climate of Rojas warmed?
Between 1940 and 2025, no statistically significant temperature trend emerges in Rojas.
What is the wettest day in Rojas?
The wettest day measured in Rojas between 1940 and 2025 was 22 October 1991, with 132 mm of rain in 24 hours.
What was the windiest day in Rojas?
The windiest day measured in Rojas between 1940 and 2025 was 29 May 1984, with winds reaching 57.6 km/h.
What is the warmest month in Rojas?
The warmest month in Rojas is January (23.9 °C on average); the coldest is July (9.7 °C).
How much does it rain in Rojas?
Rojas receives on average 921 mm of precipitation per year, spread over about 89 rainy days.
Is it sunny in Rojas?
Rojas gets on average 9.5 hours of sunshine per day, roughly 3,468 hours per year over 1940-2025.
What is the biggest single-day snowfall in Rojas?
The heaviest 24-hour snowfall measured in Rojas between 1940 and 2025 was 6 July 1960, with 2.4 cm.
Are there tropical nights in Rojas?
Yes: Rojas has on average 24 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Rojas?
In Rojas, between 1940 and 2025, the highest apparent temperature reached 42.4 °C on 15 January 2022, and the lowest was -11.6 °C on 14 June 1967.
Compare Rojas with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Rojas