Guanajuato City climate — normals and trends
Guanajuato City (Mexico) has a subtropical highland, dry winter climate (Cwb) under the Köppen-Geiger classification. Its mean annual temperature is 17.4 °C and it receives 658 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 (21.1 °C on average) and the coldest is January (13.5 °C). Rainfall peaks in July.
Guanajuato City averages 0 frost days, 23 hot days (≥ 30 °C) and 87 rainy days per year.
Guanajuato City has warmed by +2.4 °C between 1940 and 2025, or +0.28 °C per decade. This trend is statistically significant.
The hottest day of the period reached 37.0 °C (on 24 May 2024) and the coldest -3.2 °C (on 18 February 1940).
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
Guanajuato CityGuanajuato
- coords
- 21.02°, -101.26°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.4°C
Average daily high
24.6°C
Average daily low
11.3°C
Annual rainfall
658mm
Sunshine / day
11.1h
Mean relative humidity
56%
Average peak wind
16.6km/h
Seasonal range
7.6°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
23 d/yr
Rainy days (≥ 1 mm)
87 d/yr
Annual snowfall
0.3 cm
Average feels-like high
23.1 °C
Average feels-like low
9.7 °C
Average peak gust
37.2 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
22.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.76 · 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
24 May 2024
Coldest day
-3.2 °C
18 February 1940
Wettest day
64 mm
2 September 1977
Windiest day
48.1 km/h
4 March 1983
Strongest gust
93.6 km/h
4 March 1983
Hottest feels-like
36.2 °C
10 May 2024
Coldest feels-like
-8.2 °C
14 December 1997
Snowiest day
12.6 cm
11 January 1967
Sunniest day
13.0 h
24 June 1976
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 | 23.5 °C | +2.5 °C | 8 mm | -7 mm |
| Feb | 26.7 °C | +3.7 °C | 7 mm | -4 mm |
| Mar | 28.9 °C | +3.1 °C | 0 mm | -10 mm |
| Apr | 30.0 °C | +2.1 °C | 0 mm | -17 mm |
| May | 31.0 °C | +2.3 °C | 90 mm | +45 mm |
| Jun | 25.0 °C | -1.7 °C | 313 mm | +189 mm |
| Jul | 24.4 °C | -0.3 °C | 203 mm | +64 mm |
| Aug | 25.6 °C | +0.7 °C | 168 mm | +39 mm |
| Sep | 25.6 °C | +1.7 °C | 166 mm | +60 mm |
| Oct | 25.9 °C | +2.1 °C | 38 mm | -4 mm |
| Nov | 25.8 °C | +2.8 °C | 0 mm | -12 mm |
| Dec | 23.3 °C | +2.0 °C | 11 mm | +3 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 Guanajuato City?
Guanajuato City has a subtropical highland, dry winter climate (Köppen Cwb). Over 1940-2025, the average annual temperature is 17.4 °C and it receives 658 mm of precipitation per year.
What is the hottest day ever recorded in Guanajuato City?
The hottest day measured in Guanajuato City between 1940 and 2025 was 24 May 2024, reaching 37.0 °C.
What is the coldest day in Guanajuato City?
The coldest day measured in Guanajuato City between 1940 and 2025 was 18 February 1940, at -3.2 °C.
Does it snow in Guanajuato City?
Almost never: Guanajuato City sees virtually no snow, with about 0 frost days per year.
Has the climate of Guanajuato City warmed?
Yes: Guanajuato City warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Guanajuato City?
The wettest day measured in Guanajuato City between 1940 and 2025 was 2 September 1977, with 64 mm of rain in 24 hours.
What was the windiest day in Guanajuato City?
The windiest day measured in Guanajuato City between 1940 and 2025 was 4 March 1983, with winds reaching 48.1 km/h.
What is the warmest month in Guanajuato City?
The warmest month in Guanajuato City is May (21.1 °C on average); the coldest is January (13.5 °C).
How much does it rain in Guanajuato City?
Guanajuato City receives on average 658 mm of precipitation per year, spread over about 87 rainy days.
Is it sunny in Guanajuato City?
Guanajuato City 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 Guanajuato City?
The heaviest 24-hour snowfall measured in Guanajuato City between 1940 and 2025 was 11 January 1967, with 12.6 cm.
Are there tropical nights in Guanajuato City?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Guanajuato City.
What was the most extreme apparent temperature in Guanajuato City?
In Guanajuato City, between 1940 and 2025, the highest apparent temperature reached 36.2 °C on 10 May 2024, and the lowest was -8.2 °C on 14 December 1997.
Compare Guanajuato City with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Guanajuato City