Atoyac de Álvarez climate — normals and trends
Atoyac de Álvarez (Mexico) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 23.8 °C and it receives 1,849 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 (25.4 °C on average) and the coldest is January (22.2 °C). Rainfall peaks in September.
Atoyac de Álvarez averages 0 frost days, 33 hot days (≥ 30 °C) and 168 rainy days per year.
Atoyac de Álvarez has warmed by +2.0 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The hottest day of the period reached 33.9 °C (on 16 May 2002) and the coldest 13.2 °C (on 24 February 1965).
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
Atoyac de ÁlvarezGuerrero
- coords
- 17.21°, -100.43°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
23.8°C
Average daily high
27.6°C
Average daily low
20.4°C
Annual rainfall
1,849mm
Sunshine / day
10.6h
Mean relative humidity
77%
Average peak wind
11.1km/h
Seasonal range
3.2°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
33 d/yr
Rainy days (≥ 1 mm)
168 d/yr
Annual snowfall
0.0 cm
Average feels-like high
31.6 °C
Average feels-like low
22.6 °C
Average peak gust
31.9 km/h
Tropical nights (≥ 20 °C)
225 d/yr
Solar radiation
20.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.75 · 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
33.9 °C
16 May 2002
Coldest day
13.2 °C
24 February 1965
Wettest day
309 mm
16 September 1988
Windiest day
37.2 km/h
8 October 1976
Strongest gust
113.0 km/h
8 October 1976
Hottest feels-like
39.3 °C
18 July 1991
Coldest feels-like
11.3 °C
24 February 1965
Sunniest day
12.8 h
26 May 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 | 28.0 °C | +1.2 °C | 24 mm | +8 mm |
| Feb | 28.6 °C | +1.1 °C | 7 mm | -1 mm |
| Mar | 28.8 °C | +0.4 °C | 1 mm | -3 mm |
| Apr | 29.1 °C | -0.4 °C | 0 mm | -4 mm |
| May | 29.9 °C | +0.3 °C | 32 mm | -31 mm |
| Jun | 28.1 °C | +0.6 °C | 464 mm | +146 mm |
| Jul | 29.3 °C | +1.8 °C | 156 mm | -141 mm |
| Aug | 29.0 °C | +1.6 °C | 140 mm | -187 mm |
| Sep | 28.2 °C | +1.4 °C | 428 mm | -7 mm |
| Oct | 27.8 °C | +0.9 °C | 333 mm | +43 mm |
| Nov | 28.0 °C | +1.2 °C | 32 mm | -39 mm |
| Dec | 28.1 °C | +1.4 °C | 30 mm | +14 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 Atoyac de Álvarez?
Atoyac de Álvarez has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 23.8 °C and it receives 1,849 mm of precipitation per year.
What is the hottest day ever recorded in Atoyac de Álvarez?
The hottest day measured in Atoyac de Álvarez between 1940 and 2025 was 16 May 2002, reaching 33.9 °C.
What is the coldest day in Atoyac de Álvarez?
The coldest day measured in Atoyac de Álvarez between 1940 and 2025 was 24 February 1965, at 13.2 °C.
Does it snow in Atoyac de Álvarez?
Almost never: Atoyac de Álvarez sees virtually no snow, with about 0 frost days per year.
Has the climate of Atoyac de Álvarez warmed?
Yes: Atoyac de Álvarez warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Atoyac de Álvarez?
The wettest day measured in Atoyac de Álvarez between 1940 and 2025 was 16 September 1988, with 309 mm of rain in 24 hours.
What was the windiest day in Atoyac de Álvarez?
The windiest day measured in Atoyac de Álvarez between 1940 and 2025 was 8 October 1976, with winds reaching 37.2 km/h.
What is the warmest month in Atoyac de Álvarez?
The warmest month in Atoyac de Álvarez is May (25.4 °C on average); the coldest is January (22.2 °C).
How much does it rain in Atoyac de Álvarez?
Atoyac de Álvarez receives on average 1,849 mm of precipitation per year, spread over about 168 rainy days.
Is it sunny in Atoyac de Álvarez?
Atoyac de Álvarez gets on average 10.6 hours of sunshine per day, roughly 3,869 hours per year over 1940-2025.
Are there tropical nights in Atoyac de Álvarez?
Yes: Atoyac de Álvarez has on average 225 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Atoyac de Álvarez?
In Atoyac de Álvarez, between 1940 and 2025, the highest apparent temperature reached 39.3 °C on 18 July 1991, and the lowest was 11.3 °C on 24 February 1965.
Compare Atoyac de Álvarez with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Atoyac de Álvarez