San Salvador El Seco climate — normals and trends
San Salvador El Seco (Mexico) has a subtropical highland, dry winter climate (Cwb) under the Köppen-Geiger classification. Its mean annual temperature is 14.0 °C and it receives 825 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 (15.8 °C on average) and the coldest is January (11.2 °C). Rainfall peaks in June.
San Salvador El Seco averages 2 frost days, 0 hot days (≥ 30 °C) and 120 rainy days per year.
San Salvador El Seco has warmed by +2.5 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.
The number of frost days there went from about 3 to 1 per year over the period.
The hottest day of the period reached 31.7 °C (on 8 May 1998) and the coldest -5.6 °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
San Salvador El SecoPuebla
- coords
- 19.13°, -97.64°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.0°C
Average daily high
21.0°C
Average daily low
8.1°C
Annual rainfall
825mm
Sunshine / day
10.8h
Mean relative humidity
68%
Average peak wind
13.3km/h
Seasonal range
4.6°C
Frost days (< 0 °C)
2 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
120 d/yr
Annual snowfall
0.1 cm
Average feels-like high
20.0 °C
Average feels-like low
6.5 °C
Average peak gust
33.0 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
21.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.84 · 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
31.7 °C
8 May 1998
Coldest day
-5.6 °C
25 February 1976
Wettest day
91 mm
21 August 2021
Windiest day
42.1 km/h
22 August 2007
Strongest gust
84.6 km/h
22 August 2007
Hottest feels-like
32.1 °C
9 May 1998
Coldest feels-like
-9.5 °C
25 February 1976
Snowiest day
4.1 cm
11 January 1967
Sunniest day
13.0 h
26 May 1940
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 | 20.1 °C | +1.3 °C | 7 mm | -10 mm |
| Feb | 21.5 °C | +1.2 °C | 58 mm | +38 mm |
| Mar | 23.9 °C | +1.7 °C | 37 mm | +0 mm |
| Apr | 24.4 °C | +1.3 °C | 30 mm | -46 mm |
| May | 24.6 °C | +1.7 °C | 179 mm | +63 mm |
| Jun | 20.9 °C | -0.8 °C | 266 mm | +123 mm |
| Jul | 23.1 °C | +1.6 °C | 73 mm | -26 mm |
| Aug | 24.2 °C | +2.2 °C | 68 mm | -32 mm |
| Sep | 23.5 °C | +2.8 °C | 98 mm | -22 mm |
| Oct | 22.2 °C | +1.8 °C | 65 mm | +4 mm |
| Nov | 22.8 °C | +3.0 °C | 3 mm | -24 mm |
| Dec | 20.0 °C | +1.0 °C | 32 mm | +20 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 Salvador El Seco?
San Salvador El Seco has a subtropical highland, dry winter climate (Köppen Cwb). Over 1940-2025, the average annual temperature is 14.0 °C and it receives 825 mm of precipitation per year.
What is the hottest day ever recorded in San Salvador El Seco?
The hottest day measured in San Salvador El Seco between 1940 and 2025 was 8 May 1998, reaching 31.7 °C.
What is the coldest day in San Salvador El Seco?
The coldest day measured in San Salvador El Seco between 1940 and 2025 was 25 February 1976, at -5.6 °C.
Does it snow in San Salvador El Seco?
Almost never: San Salvador El Seco sees virtually no snow, with about 2 frost days per year.
Has the climate of San Salvador El Seco warmed?
Yes: San Salvador El Seco warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in San Salvador El Seco?
The wettest day measured in San Salvador El Seco between 1940 and 2025 was 21 August 2021, with 91 mm of rain in 24 hours.
What was the windiest day in San Salvador El Seco?
The windiest day measured in San Salvador El Seco between 1940 and 2025 was 22 August 2007, with winds reaching 42.1 km/h.
What is the warmest month in San Salvador El Seco?
The warmest month in San Salvador El Seco is May (15.8 °C on average); the coldest is January (11.2 °C).
How much does it rain in San Salvador El Seco?
San Salvador El Seco receives on average 825 mm of precipitation per year, spread over about 120 rainy days.
Is it sunny in San Salvador El Seco?
San Salvador El Seco gets on average 10.8 hours of sunshine per day, roughly 3,942 hours per year over 1940-2025.
What is the biggest single-day snowfall in San Salvador El Seco?
The heaviest 24-hour snowfall measured in San Salvador El Seco between 1940 and 2025 was 11 January 1967, with 4.1 cm.
Are there tropical nights in San Salvador El Seco?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in San Salvador El Seco.
What was the most extreme apparent temperature in San Salvador El Seco?
In San Salvador El Seco, between 1940 and 2025, the highest apparent temperature reached 32.1 °C on 9 May 1998, and the lowest was -9.5 °C on 25 February 1976.
Compare San Salvador El Seco with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around San Salvador El Seco