Tlalpan climate — normals and trends
Tlalpan (Mexico) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 12.1 °C and it receives 1,300 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 (14.2 °C on average) and the coldest is January (9.0 °C). Rainfall peaks in July.
Tlalpan averages 12 frost days, 0 hot days (≥ 30 °C) and 171 rainy days per year.
Tlalpan has warmed by +3.0 °C between 1940 and 2025, or +0.35 °C per decade. This trend is statistically significant.
The number of frost days there went from about 19 to 5 per year over the period.
The hottest day of the period reached 29.5 °C (on 30 May 2018) and the coldest -5.7 °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
TlalpanMexico City
- coords
- 19.30°, -99.16°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
12.1°C
Average daily high
19.1°C
Average daily low
6.1°C
Annual rainfall
1,300mm
Sunshine / day
10.4h
Mean relative humidity
72%
Average peak wind
10.3km/h
Seasonal range
5.2°C
Frost days (< 0 °C)
12 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
171 d/yr
Annual snowfall
0.3 cm
Average feels-like high
18.6 °C
Average feels-like low
4.2 °C
Average peak gust
32.1 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
20.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.0 °C
since 1940
+0.4 °C per decade · r² = 0.89 · 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
29.5 °C
30 May 2018
Coldest day
-5.7 °C
25 February 1976
Wettest day
78 mm
27 June 1973
Windiest day
31.6 km/h
28 January 1966
Strongest gust
100.1 km/h
21 August 2021
Hottest feels-like
29.7 °C
2 May 1983
Coldest feels-like
-10.1 °C
25 February 1976
Snowiest day
16.7 cm
11 January 1967
Sunniest day
13.0 h
24 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 | 18.5 °C | +1.6 °C | 38 mm | +5 mm |
| Feb | 20.1 °C | +1.5 °C | 91 mm | +58 mm |
| Mar | 22.7 °C | +2.1 °C | 27 mm | -18 mm |
| Apr | 24.1 °C | +2.5 °C | 6 mm | -86 mm |
| May | 23.3 °C | +1.8 °C | 130 mm | -10 mm |
| Jun | 19.7 °C | -0.5 °C | 322 mm | +124 mm |
| Jul | 20.4 °C | +1.5 °C | 178 mm | -48 mm |
| Aug | 20.5 °C | +1.5 °C | 213 mm | +3 mm |
| Sep | 20.8 °C | +2.2 °C | 237 mm | +66 mm |
| Oct | 20.2 °C | +1.9 °C | 94 mm | +7 mm |
| Nov | 20.1 °C | +2.4 °C | 5 mm | -35 mm |
| Dec | 18.0 °C | +1.1 °C | 70 mm | +44 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 Tlalpan?
Tlalpan has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 12.1 °C and it receives 1,300 mm of precipitation per year.
What is the hottest day ever recorded in Tlalpan?
The hottest day measured in Tlalpan between 1940 and 2025 was 30 May 2018, reaching 29.5 °C.
What is the coldest day in Tlalpan?
The coldest day measured in Tlalpan between 1940 and 2025 was 25 February 1976, at -5.7 °C.
Does it snow in Tlalpan?
Almost never: Tlalpan sees virtually no snow, with about 12 frost days per year.
Has the climate of Tlalpan warmed?
Yes: Tlalpan warmed by +3.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Tlalpan?
The wettest day measured in Tlalpan between 1940 and 2025 was 27 June 1973, with 78 mm of rain in 24 hours.
What was the windiest day in Tlalpan?
The windiest day measured in Tlalpan between 1940 and 2025 was 28 January 1966, with winds reaching 31.6 km/h.
What is the warmest month in Tlalpan?
The warmest month in Tlalpan is May (14.2 °C on average); the coldest is January (9.0 °C).
How much does it rain in Tlalpan?
Tlalpan receives on average 1,300 mm of precipitation per year, spread over about 171 rainy days.
Is it sunny in Tlalpan?
Tlalpan gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.
What is the biggest single-day snowfall in Tlalpan?
The heaviest 24-hour snowfall measured in Tlalpan between 1940 and 2025 was 11 January 1967, with 16.7 cm.
Are there tropical nights in Tlalpan?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Tlalpan.
What was the most extreme apparent temperature in Tlalpan?
In Tlalpan, between 1940 and 2025, the highest apparent temperature reached 29.7 °C on 2 May 1983, and the lowest was -10.1 °C on 25 February 1976.
Compare Tlalpan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Tlalpan