Santiago climate — normals and trends
Santiago (Mexico) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 17.6 °C and it receives 1,269 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 July (22.7 °C on average) and the coldest is January (10.8 °C). Rainfall peaks in May.
Santiago averages 4 frost days, 26 hot days (≥ 30 °C) and 144 rainy days per year.
Santiago has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The hottest day of the period reached 36.1 °C (on 28 June 1957) and the coldest -9.0 °C (on 11 January 1962).
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
SantiagoNuevo León
- coords
- 25.43°, -100.15°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.6°C
Average daily high
23.0°C
Average daily low
12.5°C
Annual rainfall
1,269mm
Sunshine / day
10.7h
Mean relative humidity
74%
Average peak wind
9.7km/h
Seasonal range
11.9°C
Frost days (< 0 °C)
4 d/yr
Hot days (≥ 30 °C)
26 d/yr
Rainy days (≥ 1 mm)
144 d/yr
Annual snowfall
1.4 cm
Average feels-like high
24.4 °C
Average feels-like low
12.1 °C
Average peak gust
34.8 km/h
Tropical nights (≥ 20 °C)
3 d/yr
Solar radiation
19.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.51 · 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
36.1 °C
28 June 1957
Coldest day
-9.0 °C
11 January 1962
Wettest day
249 mm
1 July 2010
Windiest day
24.9 km/h
20 July 2005
Strongest gust
124.2 km/h
10 August 1980
Hottest feels-like
39.7 °C
3 June 1998
Coldest feels-like
-13.9 °C
11 January 1962
Snowiest day
8.5 cm
29 January 1949
Sunniest day
13.3 h
9 July 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 | 14.8 °C | -1.8 °C | 33 mm | -31 mm |
| Feb | 20.9 °C | +2.4 °C | 35 mm | -45 mm |
| Mar | 24.8 °C | +3.5 °C | 70 mm | -58 mm |
| Apr | 26.2 °C | +2.1 °C | 44 mm | -135 mm |
| May | 27.4 °C | +1.3 °C | 196 mm | +16 mm |
| Jun | 27.9 °C | +0.3 °C | 59 mm | -31 mm |
| Jul | 28.0 °C | -0.1 °C | 139 mm | +74 mm |
| Aug | 29.1 °C | +0.9 °C | 76 mm | +2 mm |
| Sep | 26.3 °C | +0.6 °C | 135 mm | -34 mm |
| Oct | 25.3 °C | +2.3 °C | 30 mm | -87 mm |
| Nov | 23.2 °C | +3.5 °C | 71 mm | +6 mm |
| Dec | 20.2 °C | +2.7 °C | 81 mm | +27 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 Santiago?
Santiago has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.6 °C and it receives 1,269 mm of precipitation per year.
What is the hottest day ever recorded in Santiago?
The hottest day measured in Santiago between 1940 and 2025 was 28 June 1957, reaching 36.1 °C.
What is the coldest day in Santiago?
The coldest day measured in Santiago between 1940 and 2025 was 11 January 1962, at -9.0 °C.
Does it snow in Santiago?
Yes. Santiago gets on average 1.4 cm of snow per year and has around 4 frost days.
Has the climate of Santiago warmed?
Yes: Santiago warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Santiago?
The wettest day measured in Santiago between 1940 and 2025 was 1 July 2010, with 249 mm of rain in 24 hours.
What was the windiest day in Santiago?
The windiest day measured in Santiago between 1940 and 2025 was 20 July 2005, with winds reaching 24.9 km/h.
What is the warmest month in Santiago?
The warmest month in Santiago is July (22.7 °C on average); the coldest is January (10.8 °C).
How much does it rain in Santiago?
Santiago receives on average 1,269 mm of precipitation per year, spread over about 144 rainy days.
Is it sunny in Santiago?
Santiago gets on average 10.7 hours of sunshine per day, roughly 3,905 hours per year over 1940-2025.
What is the biggest single-day snowfall in Santiago?
The heaviest 24-hour snowfall measured in Santiago between 1940 and 2025 was 29 January 1949, with 8.5 cm.
Are there tropical nights in Santiago?
Yes: Santiago has on average 3 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Santiago?
In Santiago, between 1940 and 2025, the highest apparent temperature reached 39.7 °C on 3 June 1998, and the lowest was -13.9 °C on 11 January 1962.
Compare Santiago with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Santiago