General Roca climate — normals and trends
General Roca (Argentina) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 15.3 °C and it receives 257 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 (24.2 °C on average) and the coldest is July (6.5 °C). Rainfall peaks in October.
General Roca averages 21 frost days, 62 hot days (≥ 30 °C) and 44 rainy days per year.
No statistically significant temperature trend emerges for General Roca between 1940 and 2025: over this span, year-to-year swings outweigh the climate signal.
The hottest day of the period reached 42.3 °C (on 5 January 1955) and the coldest -10.8 °C (on 10 July 1965).
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
General RocaRio Negro
- coords
- -39.03°, -67.58°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.3°C
Average daily high
21.6°C
Average daily low
9.6°C
Annual rainfall
257mm
Sunshine / day
10.4h
Mean relative humidity
49%
Average peak wind
22.3km/h
Seasonal range
17.7°C
Frost days (< 0 °C)
21 d/yr
Hot days (≥ 30 °C)
62 d/yr
Rainy days (≥ 1 mm)
44 d/yr
Annual snowfall
3.0 cm
Average feels-like high
18.3 °C
Average feels-like low
6.2 °C
Average peak gust
41.9 km/h
Tropical nights (≥ 20 °C)
14 d/yr
Solar radiation
18.7 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
42.3 °C
5 January 1955
Coldest day
-10.8 °C
10 July 1965
Wettest day
71 mm
7 April 2014
Windiest day
62.4 km/h
13 August 1959
Strongest gust
112.0 km/h
13 August 1959
Hottest feels-like
42.4 °C
23 January 2021
Coldest feels-like
-15.7 °C
10 July 1965
Snowiest day
13.9 cm
17 June 1982
Sunniest day
14.8 h
21 December 1950
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 | 34.0 °C | +3.0 °C | 4 mm | -15 mm |
| Feb | 31.5 °C | +1.8 °C | 10 mm | -10 mm |
| Mar | 26.1 °C | 0.0 °C | 47 mm | +23 mm |
| Apr | 19.9 °C | -1.0 °C | 15 mm | -12 mm |
| May | 17.9 °C | +1.9 °C | 4 mm | -18 mm |
| Jun | 14.3 °C | +1.9 °C | 3 mm | -18 mm |
| Jul | 12.9 °C | +0.8 °C | 20 mm | +2 mm |
| Aug | 16.6 °C | +1.7 °C | 8 mm | -8 mm |
| Sep | 19.9 °C | +1.7 °C | 18 mm | -6 mm |
| Oct | 24.6 °C | +2.6 °C | 4 mm | -24 mm |
| Nov | 27.1 °C | +0.7 °C | 46 mm | +26 mm |
| Dec | 30.8 °C | +1.3 °C | 2 mm | -16 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 General Roca?
General Roca has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 15.3 °C and it receives 257 mm of precipitation per year.
What is the hottest day ever recorded in General Roca?
The hottest day measured in General Roca between 1940 and 2025 was 5 January 1955, reaching 42.3 °C.
What is the coldest day in General Roca?
The coldest day measured in General Roca between 1940 and 2025 was 10 July 1965, at -10.8 °C.
Does it snow in General Roca?
Yes. General Roca gets on average 3.0 cm of snow per year and has around 21 frost days.
Has the climate of General Roca warmed?
Between 1940 and 2025, no statistically significant temperature trend emerges in General Roca.
What is the wettest day in General Roca?
The wettest day measured in General Roca between 1940 and 2025 was 7 April 2014, with 71 mm of rain in 24 hours.
What was the windiest day in General Roca?
The windiest day measured in General Roca between 1940 and 2025 was 13 August 1959, with winds reaching 62.4 km/h.
What is the warmest month in General Roca?
The warmest month in General Roca is January (24.2 °C on average); the coldest is July (6.5 °C).
How much does it rain in General Roca?
General Roca receives on average 257 mm of precipitation per year, spread over about 44 rainy days.
Is it sunny in General Roca?
General Roca gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.
What is the biggest single-day snowfall in General Roca?
The heaviest 24-hour snowfall measured in General Roca between 1940 and 2025 was 17 June 1982, with 13.9 cm.
Are there tropical nights in General Roca?
Yes: General Roca has on average 14 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in General Roca?
In General Roca, between 1940 and 2025, the highest apparent temperature reached 42.4 °C on 23 January 2021, and the lowest was -15.7 °C on 10 July 1965.
Compare General Roca with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around General Roca