San Cristóbal de las Casas climate — normals and trends
San Cristóbal de las Casas (Mexico) has a subtropical highland, dry winter climate (Cwb) under the Köppen-Geiger classification. Its mean annual temperature is 18.6 °C and it receives 2,035 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 April (20.4 °C on average) and the coldest is January (16.6 °C). Rainfall peaks in June.
San Cristóbal de las Casas averages 0 frost days, 6 hot days (≥ 30 °C) and 164 rainy days per year.
San Cristóbal de las Casas has warmed by +2.3 °C between 1940 and 2025, or +0.27 °C per decade. This trend is statistically significant.
The hottest day of the period reached 34.9 °C (on 7 May 2024) and the coldest 3.9 °C (on 6 December 1945).
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
San Cristóbal de las CasasChiapas
- coords
- 16.73°, -92.64°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
18.6°C
Average daily high
24.5°C
Average daily low
14.1°C
Annual rainfall
2,035mm
Sunshine / day
10.5h
Mean relative humidity
75%
Average peak wind
7.5km/h
Seasonal range
3.8°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
6 d/yr
Rainy days (≥ 1 mm)
164 d/yr
Annual snowfall
0.0 cm
Average feels-like high
26.4 °C
Average feels-like low
14.3 °C
Average peak gust
30.1 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
19.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.3 °C
since 1940
+0.3 °C per decade · r² = 0.85 · 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
34.9 °C
7 May 2024
Coldest day
3.9 °C
6 December 1945
Wettest day
171 mm
30 May 1986
Windiest day
23.2 km/h
26 February 1958
Strongest gust
80.6 km/h
1 November 1961
Hottest feels-like
38.9 °C
7 May 2024
Coldest feels-like
-0.3 °C
4 February 1998
Sunniest day
12.7 h
21 July 2025
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 | 25.6 °C | +2.6 °C | 8 mm | -4 mm |
| Feb | 26.8 °C | +2.3 °C | 23 mm | +12 mm |
| Mar | 28.6 °C | +2.3 °C | 11 mm | -11 mm |
| Apr | 28.2 °C | +1.0 °C | 18 mm | -39 mm |
| May | 28.8 °C | +2.4 °C | 141 mm | -64 mm |
| Jun | 25.3 °C | +0.8 °C | 688 mm | +245 mm |
| Jul | 26.4 °C | +1.7 °C | 146 mm | -140 mm |
| Aug | 25.9 °C | +1.2 °C | 290 mm | -34 mm |
| Sep | 25.1 °C | +1.3 °C | 439 mm | +35 mm |
| Oct | 25.0 °C | +1.7 °C | 197 mm | 0 mm |
| Nov | 24.6 °C | +1.6 °C | 38 mm | -16 mm |
| Dec | 24.2 °C | +1.4 °C | 55 mm | +35 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 San Cristóbal de las Casas?
San Cristóbal de las Casas has a subtropical highland, dry winter climate (Köppen Cwb). Over 1940-2025, the average annual temperature is 18.6 °C and it receives 2,035 mm of precipitation per year.
What is the hottest day ever recorded in San Cristóbal de las Casas?
The hottest day measured in San Cristóbal de las Casas between 1940 and 2025 was 7 May 2024, reaching 34.9 °C.
What is the coldest day in San Cristóbal de las Casas?
The coldest day measured in San Cristóbal de las Casas between 1940 and 2025 was 6 December 1945, at 3.9 °C.
Does it snow in San Cristóbal de las Casas?
Almost never: San Cristóbal de las Casas sees virtually no snow, with about 0 frost days per year.
Has the climate of San Cristóbal de las Casas warmed?
Yes: San Cristóbal de las Casas warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in San Cristóbal de las Casas?
The wettest day measured in San Cristóbal de las Casas between 1940 and 2025 was 30 May 1986, with 171 mm of rain in 24 hours.
What was the windiest day in San Cristóbal de las Casas?
The windiest day measured in San Cristóbal de las Casas between 1940 and 2025 was 26 February 1958, with winds reaching 23.2 km/h.
What is the warmest month in San Cristóbal de las Casas?
The warmest month in San Cristóbal de las Casas is April (20.4 °C on average); the coldest is January (16.6 °C).
How much does it rain in San Cristóbal de las Casas?
San Cristóbal de las Casas receives on average 2,035 mm of precipitation per year, spread over about 164 rainy days.
Is it sunny in San Cristóbal de las Casas?
San Cristóbal de las Casas gets on average 10.5 hours of sunshine per day, roughly 3,833 hours per year over 1940-2025.
Are there tropical nights in San Cristóbal de las Casas?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in San Cristóbal de las Casas.
What was the most extreme apparent temperature in San Cristóbal de las Casas?
In San Cristóbal de las Casas, between 1940 and 2025, the highest apparent temperature reached 38.9 °C on 7 May 2024, and the lowest was -0.3 °C on 4 February 1998.
Compare San Cristóbal de las Casas with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around San Cristóbal de las Casas