Calvillo climate — normals and trends
Calvillo (Mexico) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 17.7 °C and it receives 642 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 May (21.6 °C on average) and the coldest is January (13.2 °C). Rainfall peaks in July.
Calvillo averages 0 frost days, 37 hot days (≥ 30 °C) and 85 rainy days per year.
Calvillo has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The hottest day of the period reached 37.0 °C (on 20 May 2024) and the coldest -3.8 °C (on 14 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
CalvilloAguascalientes
- coords
- 21.85°, -102.72°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.7°C
Average daily high
25.2°C
Average daily low
10.8°C
Annual rainfall
642mm
Sunshine / day
11.1h
Mean relative humidity
53%
Average peak wind
11.7km/h
Seasonal range
8.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
37 d/yr
Rainy days (≥ 1 mm)
85 d/yr
Annual snowfall
0.2 cm
Average feels-like high
24.3 °C
Average feels-like low
9.3 °C
Average peak gust
33.1 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
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.57 · 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
37.0 °C
20 May 2024
Coldest day
-3.8 °C
14 December 1997
Wettest day
56 mm
4 March 1968
Windiest day
34.0 km/h
4 March 1983
Strongest gust
88.6 km/h
4 March 1983
Hottest feels-like
38.1 °C
5 June 1998
Coldest feels-like
-8.6 °C
14 December 1997
Snowiest day
11.1 cm
12 January 1967
Sunniest day
13.3 h
27 June 1944
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 | 22.6 °C | +1.6 °C | 8 mm | -8 mm |
| Feb | 26.6 °C | +3.5 °C | 0 mm | -10 mm |
| Mar | 28.5 °C | +2.5 °C | 0 mm | -6 mm |
| Apr | 30.1 °C | +1.7 °C | 1 mm | -7 mm |
| May | 31.7 °C | +1.8 °C | 19 mm | -6 mm |
| Jun | 27.7 °C | -0.5 °C | 171 mm | +57 mm |
| Jul | 25.6 °C | 0.0 °C | 215 mm | +58 mm |
| Aug | 26.2 °C | +0.6 °C | 193 mm | +58 mm |
| Sep | 26.1 °C | +1.2 °C | 185 mm | +77 mm |
| Oct | 26.4 °C | +1.7 °C | 48 mm | +6 mm |
| Nov | 26.3 °C | +2.7 °C | 0 mm | -10 mm |
| Dec | 23.7 °C | +2.2 °C | 7 mm | -5 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 Calvillo?
Calvillo has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 17.7 °C and it receives 642 mm of precipitation per year.
What is the hottest day ever recorded in Calvillo?
The hottest day measured in Calvillo between 1940 and 2025 was 20 May 2024, reaching 37.0 °C.
What is the coldest day in Calvillo?
The coldest day measured in Calvillo between 1940 and 2025 was 14 December 1997, at -3.8 °C.
Does it snow in Calvillo?
Almost never: Calvillo sees virtually no snow, with about 0 frost days per year.
Has the climate of Calvillo warmed?
Yes: Calvillo warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Calvillo?
The wettest day measured in Calvillo between 1940 and 2025 was 4 March 1968, with 56 mm of rain in 24 hours.
What was the windiest day in Calvillo?
The windiest day measured in Calvillo between 1940 and 2025 was 4 March 1983, with winds reaching 34.0 km/h.
What is the warmest month in Calvillo?
The warmest month in Calvillo is May (21.6 °C on average); the coldest is January (13.2 °C).
How much does it rain in Calvillo?
Calvillo receives on average 642 mm of precipitation per year, spread over about 85 rainy days.
Is it sunny in Calvillo?
Calvillo 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 Calvillo?
The heaviest 24-hour snowfall measured in Calvillo between 1940 and 2025 was 12 January 1967, with 11.1 cm.
Are there tropical nights in Calvillo?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Calvillo.
What was the most extreme apparent temperature in Calvillo?
In Calvillo, between 1940 and 2025, the highest apparent temperature reached 38.1 °C on 5 June 1998, and the lowest was -8.6 °C on 14 December 1997.
Compare Calvillo with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Calvillo