Río Grande climate — normals and trends
Río Grande (Mexico) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 17.6 °C and it receives 371 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 June (22.2 °C on average) and the coldest is January (11.7 °C). Rainfall peaks in August.
Río Grande averages 4 frost days, 35 hot days (≥ 30 °C) and 60 rainy days per year.
Río Grande has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The number of frost days there went from about 6 to 2 per year over the period.
The hottest day of the period reached 36.5 °C (on 1 June 2024) and the coldest -7.6 °C (on 13 December 1997).
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
Río GrandeZacatecas
- coords
- 23.83°, -103.03°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.6°C
Average daily high
24.6°C
Average daily low
10.8°C
Annual rainfall
371mm
Sunshine / day
11.1h
Mean relative humidity
48%
Average peak wind
19.9km/h
Seasonal range
10.5°C
Frost days (< 0 °C)
4 d/yr
Hot days (≥ 30 °C)
35 d/yr
Rainy days (≥ 1 mm)
60 d/yr
Annual snowfall
0.5 cm
Average feels-like high
22.4 °C
Average feels-like low
8.6 °C
Average peak gust
35.1 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
22.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.45 · p = < 0.001
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
36.5 °C
1 June 2024
Coldest day
-7.6 °C
13 December 1997
Wettest day
58 mm
12 January 1987
Windiest day
62.2 km/h
29 December 1969
Strongest gust
96.8 km/h
29 December 1969
Hottest feels-like
36.4 °C
21 May 2024
Coldest feels-like
-13.7 °C
13 December 1997
Snowiest day
11.1 cm
12 January 1987
Sunniest day
13.5 h
29 June 1942
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 | 21.8 °C | +2.2 °C | 4 mm | -8 mm |
| Feb | 26.2 °C | +4.3 °C | 0 mm | -8 mm |
| Mar | 27.7 °C | +2.9 °C | 0 mm | -6 mm |
| Apr | 29.2 °C | +1.8 °C | 1 mm | -8 mm |
| May | 31.0 °C | +1.9 °C | 26 mm | +7 mm |
| Jun | 28.3 °C | -0.2 °C | 71 mm | +18 mm |
| Jul | 25.6 °C | -1.1 °C | 111 mm | +41 mm |
| Aug | 26.9 °C | +0.5 °C | 84 mm | +11 mm |
| Sep | 24.6 °C | -0.2 °C | 135 mm | +63 mm |
| Oct | 25.9 °C | +2.0 °C | 6 mm | -23 mm |
| Nov | 24.7 °C | +2.3 °C | 1 mm | -8 mm |
| Dec | 21.9 °C | +1.8 °C | 16 mm | +6 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 Río Grande?
Río Grande has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 17.6 °C and it receives 371 mm of precipitation per year.
What is the hottest day ever recorded in Río Grande?
The hottest day measured in Río Grande between 1940 and 2025 was 1 June 2024, reaching 36.5 °C.
What is the coldest day in Río Grande?
The coldest day measured in Río Grande between 1940 and 2025 was 13 December 1997, at -7.6 °C.
Does it snow in Río Grande?
Almost never: Río Grande sees virtually no snow, with about 4 frost days per year.
Has the climate of Río Grande warmed?
Yes: Río Grande warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Río Grande?
The wettest day measured in Río Grande between 1940 and 2025 was 12 January 1987, with 58 mm of rain in 24 hours.
What was the windiest day in Río Grande?
The windiest day measured in Río Grande between 1940 and 2025 was 29 December 1969, with winds reaching 62.2 km/h.
What is the warmest month in Río Grande?
The warmest month in Río Grande is June (22.2 °C on average); the coldest is January (11.7 °C).
How much does it rain in Río Grande?
Río Grande receives on average 371 mm of precipitation per year, spread over about 60 rainy days.
Is it sunny in Río Grande?
Río Grande gets on average 11.1 hours of sunshine per day, roughly 4,052 hours per year over 1940-2025.
What is the biggest single-day snowfall in Río Grande?
The heaviest 24-hour snowfall measured in Río Grande between 1940 and 2025 was 12 January 1987, with 11.1 cm.
Are there tropical nights in Río Grande?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Río Grande.
What was the most extreme apparent temperature in Río Grande?
In Río Grande, between 1940 and 2025, the highest apparent temperature reached 36.4 °C on 21 May 2024, and the lowest was -13.7 °C on 13 December 1997.
Compare Río Grande with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Río Grande