Celaya climate — normals and trends
Celaya (Mexico) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 18.3 °C and it receives 594 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 (21.8 °C on average) and the coldest is January (14.4 °C). Rainfall peaks in July.
Celaya averages 0 frost days, 47 hot days (≥ 30 °C) and 83 rainy days per year.
Celaya has warmed by +2.7 °C between 1940 and 2025, or +0.32 °C per decade. This trend is statistically significant.
The hottest day of the period reached 38.1 °C (on 24 May 2024) and the coldest -4.7 °C (on 25 February 1976).
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
CelayaGuanajuato
- coords
- 20.52°, -100.81°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
18.3°C
Average daily high
25.9°C
Average daily low
11.6°C
Annual rainfall
594mm
Sunshine / day
11.0h
Mean relative humidity
57%
Average peak wind
14.4km/h
Seasonal range
7.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
47 d/yr
Rainy days (≥ 1 mm)
83 d/yr
Annual snowfall
0.1 cm
Average feels-like high
25.0 °C
Average feels-like low
10.5 °C
Average peak gust
35.4 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
21.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.7 °C
since 1940
+0.3 °C per decade · r² = 0.80 · 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
38.1 °C
24 May 2024
Coldest day
-4.7 °C
25 February 1976
Wettest day
65 mm
3 February 2010
Windiest day
38.9 km/h
9 March 2016
Strongest gust
95.4 km/h
9 March 2016
Hottest feels-like
38.0 °C
10 May 2024
Coldest feels-like
-8.6 °C
25 February 1976
Snowiest day
3.9 cm
2 January 1947
Sunniest day
13.0 h
28 June 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 | 25.3 °C | +2.7 °C | 7 mm | -6 mm |
| Feb | 28.1 °C | +3.4 °C | 5 mm | -5 mm |
| Mar | 30.5 °C | +3.1 °C | 1 mm | -8 mm |
| Apr | 31.7 °C | +2.3 °C | 0 mm | -15 mm |
| May | 32.2 °C | +2.2 °C | 83 mm | +40 mm |
| Jun | 26.4 °C | -1.4 °C | 260 mm | +146 mm |
| Jul | 25.8 °C | -0.1 °C | 192 mm | +69 mm |
| Aug | 27.0 °C | +0.9 °C | 170 mm | +56 mm |
| Sep | 26.5 °C | +1.3 °C | 142 mm | +45 mm |
| Oct | 26.7 °C | +1.7 °C | 57 mm | +18 mm |
| Nov | 27.1 °C | +2.8 °C | 0 mm | -11 mm |
| Dec | 24.9 °C | +2.0 °C | 7 mm | +0 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 Celaya?
Celaya has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 18.3 °C and it receives 594 mm of precipitation per year.
What is the hottest day ever recorded in Celaya?
The hottest day measured in Celaya between 1940 and 2025 was 24 May 2024, reaching 38.1 °C.
What is the coldest day in Celaya?
The coldest day measured in Celaya between 1940 and 2025 was 25 February 1976, at -4.7 °C.
Does it snow in Celaya?
Almost never: Celaya sees virtually no snow, with about 0 frost days per year.
Has the climate of Celaya warmed?
Yes: Celaya warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Celaya?
The wettest day measured in Celaya between 1940 and 2025 was 3 February 2010, with 65 mm of rain in 24 hours.
What was the windiest day in Celaya?
The windiest day measured in Celaya between 1940 and 2025 was 9 March 2016, with winds reaching 38.9 km/h.
What is the warmest month in Celaya?
The warmest month in Celaya is May (21.8 °C on average); the coldest is January (14.4 °C).
How much does it rain in Celaya?
Celaya receives on average 594 mm of precipitation per year, spread over about 83 rainy days.
Is it sunny in Celaya?
Celaya gets on average 11.0 hours of sunshine per day, roughly 4,015 hours per year over 1940-2025.
What is the biggest single-day snowfall in Celaya?
The heaviest 24-hour snowfall measured in Celaya between 1940 and 2025 was 2 January 1947, with 3.9 cm.
Are there tropical nights in Celaya?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Celaya.
What was the most extreme apparent temperature in Celaya?
In Celaya, between 1940 and 2025, the highest apparent temperature reached 38.0 °C on 10 May 2024, and the lowest was -8.6 °C on 25 February 1976.
Compare Celaya with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Celaya