Juan Aldama climate — normals and trends
Juan Aldama (Mexico) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 16.7 °C and it receives 471 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 (21.5 °C on average) and the coldest is January (11.1 °C). Rainfall peaks in July.
Juan Aldama averages 5 frost days, 17 hot days (≥ 30 °C) and 69 rainy days per year.
Juan Aldama has warmed by +2.0 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.
The number of frost days there went from about 7 to 3 per year over the period.
The hottest day of the period reached 35.9 °C (on 1 June 2024) and the coldest -10.0 °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
Juan AldamaZacatecas
- coords
- 24.29°, -103.39°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.7°C
Average daily high
23.3°C
Average daily low
10.5°C
Annual rainfall
471mm
Sunshine / day
11.1h
Mean relative humidity
48%
Average peak wind
21.0km/h
Seasonal range
10.4°C
Frost days (< 0 °C)
5 d/yr
Hot days (≥ 30 °C)
17 d/yr
Rainy days (≥ 1 mm)
69 d/yr
Annual snowfall
0.9 cm
Average feels-like high
20.7 °C
Average feels-like low
7.8 °C
Average peak gust
37.8 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
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.47 · 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
35.9 °C
1 June 2024
Coldest day
-10.0 °C
13 December 1997
Wettest day
57 mm
3 October 1996
Windiest day
61.7 km/h
27 March 1999
Strongest gust
105.1 km/h
27 March 1999
Hottest feels-like
35.4 °C
3 June 1982
Coldest feels-like
-15.5 °C
13 December 1997
Snowiest day
22.2 cm
12 January 1987
Sunniest day
13.5 h
17 June 2024
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 | 20.5 °C | +2.3 °C | 5 mm | -8 mm |
| Feb | 25.1 °C | +4.7 °C | 0 mm | -8 mm |
| Mar | 26.3 °C | +3.0 °C | 0 mm | -7 mm |
| Apr | 27.9 °C | +1.9 °C | 1 mm | -10 mm |
| May | 29.7 °C | +1.8 °C | 26 mm | +4 mm |
| Jun | 28.0 °C | +0.6 °C | 65 mm | +2 mm |
| Jul | 24.4 °C | -1.0 °C | 165 mm | +65 mm |
| Aug | 25.8 °C | +0.9 °C | 104 mm | +5 mm |
| Sep | 23.4 °C | +0.1 °C | 166 mm | +70 mm |
| Oct | 24.9 °C | +2.4 °C | 7 mm | -25 mm |
| Nov | 23.5 °C | +2.4 °C | 0 mm | -9 mm |
| Dec | 20.9 °C | +2.1 °C | 9 mm | -1 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 Juan Aldama?
Juan Aldama has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 16.7 °C and it receives 471 mm of precipitation per year.
What is the hottest day ever recorded in Juan Aldama?
The hottest day measured in Juan Aldama between 1940 and 2025 was 1 June 2024, reaching 35.9 °C.
What is the coldest day in Juan Aldama?
The coldest day measured in Juan Aldama between 1940 and 2025 was 13 December 1997, at -10.0 °C.
Does it snow in Juan Aldama?
Almost never: Juan Aldama sees virtually no snow, with about 5 frost days per year.
Has the climate of Juan Aldama warmed?
Yes: Juan Aldama warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Juan Aldama?
The wettest day measured in Juan Aldama between 1940 and 2025 was 3 October 1996, with 57 mm of rain in 24 hours.
What was the windiest day in Juan Aldama?
The windiest day measured in Juan Aldama between 1940 and 2025 was 27 March 1999, with winds reaching 61.7 km/h.
What is the warmest month in Juan Aldama?
The warmest month in Juan Aldama is June (21.5 °C on average); the coldest is January (11.1 °C).
How much does it rain in Juan Aldama?
Juan Aldama receives on average 471 mm of precipitation per year, spread over about 69 rainy days.
Is it sunny in Juan Aldama?
Juan Aldama 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 Juan Aldama?
The heaviest 24-hour snowfall measured in Juan Aldama between 1940 and 2025 was 12 January 1987, with 22.2 cm.
Are there tropical nights in Juan Aldama?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Juan Aldama.
What was the most extreme apparent temperature in Juan Aldama?
In Juan Aldama, between 1940 and 2025, the highest apparent temperature reached 35.4 °C on 3 June 1982, and the lowest was -15.5 °C on 13 December 1997.
Compare Juan Aldama with another city
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Nearby cities
The climate around Juan Aldama