Acatlán de Osorio climate — normals and trends
Acatlán de Osorio (Mexico) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 21.2 °C and it receives 615 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 (23.9 °C on average) and the coldest is January (18.1 °C). Rainfall peaks in September.
Acatlán de Osorio averages 0 frost days, 127 hot days (≥ 30 °C) and 80 rainy days per year.
Acatlán de Osorio has warmed by +2.5 °C between 1940 and 2025, or +0.30 °C per decade. This trend is statistically significant.
The hottest day of the period reached 38.7 °C (on 27 May 2024) and the coldest 3.1 °C (on 13 January 1956).
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
Acatlán de OsorioPuebla
- coords
- 18.20°, -98.05°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
21.2°C
Average daily high
28.8°C
Average daily low
14.8°C
Annual rainfall
615mm
Sunshine / day
11.2h
Mean relative humidity
56%
Average peak wind
15.3km/h
Seasonal range
5.8°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
127 d/yr
Rainy days (≥ 1 mm)
80 d/yr
Annual snowfall
0.0 cm
Average feels-like high
28.6 °C
Average feels-like low
14.1 °C
Average peak gust
36.6 km/h
Tropical nights (≥ 20 °C)
3 d/yr
Solar radiation
22.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.77 · 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
38.7 °C
27 May 2024
Coldest day
3.1 °C
13 January 1956
Wettest day
56 mm
26 September 1980
Windiest day
35.4 km/h
10 March 2016
Strongest gust
77.4 km/h
9 March 2016
Hottest feels-like
40.2 °C
10 May 2024
Coldest feels-like
-1.3 °C
13 January 1956
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 | 28.3 °C | +2.1 °C | 1 mm | -3 mm |
| Feb | 30.4 °C | +2.5 °C | 3 mm | -1 mm |
| Mar | 32.5 °C | +2.3 °C | 1 mm | -3 mm |
| Apr | 32.9 °C | +1.0 °C | 5 mm | -6 mm |
| May | 33.1 °C | +1.3 °C | 143 mm | +96 mm |
| Jun | 27.3 °C | -1.7 °C | 239 mm | +105 mm |
| Jul | 29.9 °C | +1.0 °C | 56 mm | -36 mm |
| Aug | 30.4 °C | +0.9 °C | 123 mm | +13 mm |
| Sep | 29.1 °C | +1.4 °C | 200 mm | +56 mm |
| Oct | 28.5 °C | +0.6 °C | 107 mm | +55 mm |
| Nov | 29.4 °C | +1.8 °C | 0 mm | -9 mm |
| Dec | 28.4 °C | +1.9 °C | 3 mm | +1 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 Acatlán de Osorio?
Acatlán de Osorio has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 21.2 °C and it receives 615 mm of precipitation per year.
What is the hottest day ever recorded in Acatlán de Osorio?
The hottest day measured in Acatlán de Osorio between 1940 and 2025 was 27 May 2024, reaching 38.7 °C.
What is the coldest day in Acatlán de Osorio?
The coldest day measured in Acatlán de Osorio between 1940 and 2025 was 13 January 1956, at 3.1 °C.
Does it snow in Acatlán de Osorio?
Almost never: Acatlán de Osorio sees virtually no snow, with about 0 frost days per year.
Has the climate of Acatlán de Osorio warmed?
Yes: Acatlán de Osorio warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Acatlán de Osorio?
The wettest day measured in Acatlán de Osorio between 1940 and 2025 was 26 September 1980, with 56 mm of rain in 24 hours.
What was the windiest day in Acatlán de Osorio?
The windiest day measured in Acatlán de Osorio between 1940 and 2025 was 10 March 2016, with winds reaching 35.4 km/h.
What is the warmest month in Acatlán de Osorio?
The warmest month in Acatlán de Osorio is May (23.9 °C on average); the coldest is January (18.1 °C).
How much does it rain in Acatlán de Osorio?
Acatlán de Osorio receives on average 615 mm of precipitation per year, spread over about 80 rainy days.
Is it sunny in Acatlán de Osorio?
Acatlán de Osorio gets on average 11.2 hours of sunshine per day, roughly 4,088 hours per year over 1940-2025.
Are there tropical nights in Acatlán de Osorio?
Yes: Acatlán de Osorio has on average 3 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Acatlán de Osorio?
In Acatlán de Osorio, between 1940 and 2025, the highest apparent temperature reached 40.2 °C on 10 May 2024, and the lowest was -1.3 °C on 13 January 1956.
Compare Acatlán de Osorio with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Acatlán de Osorio