Rio Colorado climate — normals and trends
Rio Colorado (Argentina) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 15.6 °C and it receives 445 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 (7.4 °C). Rainfall peaks in March.
Rio Colorado averages 20 frost days, 61 hot days (≥ 30 °C) and 64 rainy days per year.
The mean temperature of Rio Colorado has changed by -0.5 °C between 1940 and 2025, or -0.05 °C per decade. This trend is statistically significant.
The number of frost days there went from about 14 to 26 per year over the period.
The hottest day of the period reached 42.8 °C (on 21 January 1980) and the coldest -9.6 °C (on 9 July 2007).
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
Rio ColoradoRio Negro
- coords
- -38.99°, -64.10°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.6°C
Average daily high
21.9°C
Average daily low
9.9°C
Annual rainfall
445mm
Sunshine / day
10.1h
Mean relative humidity
57%
Average peak wind
21.5km/h
Seasonal range
16.8°C
Frost days (< 0 °C)
20 d/yr
Hot days (≥ 30 °C)
61 d/yr
Rainy days (≥ 1 mm)
64 d/yr
Annual snowfall
0.3 cm
Average feels-like high
19.5 °C
Average feels-like low
6.9 °C
Average peak gust
41.1 km/h
Tropical nights (≥ 20 °C)
17 d/yr
Solar radiation
17.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
-0.5 °C
since 1940
-0.1 °C per decade · r² = 0.05 · p = 0.041
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
42.8 °C
21 January 1980
Coldest day
-9.6 °C
9 July 2007
Wettest day
175 mm
3 March 1987
Windiest day
59.8 km/h
19 April 1976
Strongest gust
115.9 km/h
19 April 1976
Hottest feels-like
44.0 °C
6 February 2024
Coldest feels-like
-14.6 °C
9 July 2007
Snowiest day
6.0 cm
22 July 2009
Sunniest day
14.7 h
30 December 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 | 32.3 °C | +1.3 °C | 14 mm | -26 mm |
| Feb | 30.1 °C | +0.5 °C | 41 mm | -6 mm |
| Mar | 25.3 °C | -0.8 °C | 62 mm | +8 mm |
| Apr | 19.7 °C | -1.7 °C | 45 mm | +7 mm |
| May | 18.1 °C | +1.3 °C | 4 mm | -24 mm |
| Jun | 14.4 °C | +1.1 °C | 3 mm | -18 mm |
| Jul | 14.0 °C | +1.0 °C | 9 mm | -13 mm |
| Aug | 17.2 °C | +1.6 °C | 18 mm | -5 mm |
| Sep | 20.2 °C | +1.7 °C | 76 mm | +38 mm |
| Oct | 23.4 °C | +1.4 °C | 25 mm | -21 mm |
| Nov | 26.4 °C | +0.3 °C | 62 mm | +15 mm |
| Dec | 31.1 °C | +1.7 °C | 8 mm | -35 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 Rio Colorado?
Rio Colorado has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 15.6 °C and it receives 445 mm of precipitation per year.
What is the hottest day ever recorded in Rio Colorado?
The hottest day measured in Rio Colorado between 1940 and 2025 was 21 January 1980, reaching 42.8 °C.
What is the coldest day in Rio Colorado?
The coldest day measured in Rio Colorado between 1940 and 2025 was 9 July 2007, at -9.6 °C.
Does it snow in Rio Colorado?
Almost never: Rio Colorado sees virtually no snow, with about 20 frost days per year.
Has the climate of Rio Colorado warmed?
Between 1940 and 2025, no statistically significant temperature trend emerges in Rio Colorado.
What is the wettest day in Rio Colorado?
The wettest day measured in Rio Colorado between 1940 and 2025 was 3 March 1987, with 175 mm of rain in 24 hours.
What was the windiest day in Rio Colorado?
The windiest day measured in Rio Colorado between 1940 and 2025 was 19 April 1976, with winds reaching 59.8 km/h.
What is the warmest month in Rio Colorado?
The warmest month in Rio Colorado is January (24.2 °C on average); the coldest is July (7.4 °C).
How much does it rain in Rio Colorado?
Rio Colorado receives on average 445 mm of precipitation per year, spread over about 64 rainy days.
Is it sunny in Rio Colorado?
Rio Colorado gets on average 10.1 hours of sunshine per day, roughly 3,687 hours per year over 1940-2025.
What is the biggest single-day snowfall in Rio Colorado?
The heaviest 24-hour snowfall measured in Rio Colorado between 1940 and 2025 was 22 July 2009, with 6.0 cm.
Are there tropical nights in Rio Colorado?
Yes: Rio Colorado has on average 17 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Rio Colorado?
In Rio Colorado, between 1940 and 2025, the highest apparent temperature reached 44.0 °C on 6 February 2024, and the lowest was -14.6 °C on 9 July 2007.
Compare Rio Colorado with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Rio Colorado