El Grullo climate — normals and trends
El Grullo (Mexico) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 20.9 °C and it receives 959 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 (23.6 °C on average) and the coldest is January (18.1 °C). Rainfall peaks in July.
El Grullo averages 0 frost days, 92 hot days (≥ 30 °C) and 139 rainy days per year.
El Grullo has warmed by +2.0 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.
The hottest day of the period reached 37.2 °C (on 8 May 1984) and the coldest 2.7 °C (on 11 January 1997).
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
El GrulloJalisco
- coords
- 19.81°, -104.22°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
20.9°C
Average daily high
28.1°C
Average daily low
15.0°C
Annual rainfall
959mm
Sunshine / day
10.3h
Mean relative humidity
69%
Average peak wind
9.3km/h
Seasonal range
5.5°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
92 d/yr
Rainy days (≥ 1 mm)
139 d/yr
Annual snowfall
0.0 cm
Average feels-like high
29.7 °C
Average feels-like low
15.5 °C
Average peak gust
32.0 km/h
Tropical nights (≥ 20 °C)
6 d/yr
Solar radiation
20.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.79 · 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
37.2 °C
8 May 1984
Coldest day
2.7 °C
11 January 1997
Wettest day
132 mm
12 October 2011
Windiest day
20.6 km/h
12 October 2011
Strongest gust
95.0 km/h
28 August 2021
Hottest feels-like
40.0 °C
8 June 1980
Coldest feels-like
0.1 °C
11 January 1997
Sunniest day
13.0 h
11 June 1945
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 | 27.8 °C | +1.5 °C | 8 mm | -16 mm |
| Feb | 30.1 °C | +2.4 °C | 5 mm | -9 mm |
| Mar | 31.3 °C | +1.7 °C | 0 mm | -8 mm |
| Apr | 31.6 °C | +0.3 °C | 0 mm | -6 mm |
| May | 32.4 °C | +0.5 °C | 18 mm | -3 mm |
| Jun | 28.6 °C | -0.4 °C | 204 mm | +44 mm |
| Jul | 28.9 °C | +1.8 °C | 165 mm | -37 mm |
| Aug | 28.7 °C | +1.6 °C | 156 mm | -38 mm |
| Sep | 28.6 °C | +1.8 °C | 207 mm | +9 mm |
| Oct | 29.1 °C | +1.9 °C | 80 mm | -11 mm |
| Nov | 30.3 °C | +3.0 °C | 5 mm | -16 mm |
| Dec | 28.5 °C | +2.0 °C | 18 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 El Grullo?
El Grullo has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 20.9 °C and it receives 959 mm of precipitation per year.
What is the hottest day ever recorded in El Grullo?
The hottest day measured in El Grullo between 1940 and 2025 was 8 May 1984, reaching 37.2 °C.
What is the coldest day in El Grullo?
The coldest day measured in El Grullo between 1940 and 2025 was 11 January 1997, at 2.7 °C.
Does it snow in El Grullo?
Almost never: El Grullo sees virtually no snow, with about 0 frost days per year.
Has the climate of El Grullo warmed?
Yes: El Grullo warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in El Grullo?
The wettest day measured in El Grullo between 1940 and 2025 was 12 October 2011, with 132 mm of rain in 24 hours.
What was the windiest day in El Grullo?
The windiest day measured in El Grullo between 1940 and 2025 was 12 October 2011, with winds reaching 20.6 km/h.
What is the warmest month in El Grullo?
The warmest month in El Grullo is May (23.6 °C on average); the coldest is January (18.1 °C).
How much does it rain in El Grullo?
El Grullo receives on average 959 mm of precipitation per year, spread over about 139 rainy days.
Is it sunny in El Grullo?
El Grullo gets on average 10.3 hours of sunshine per day, roughly 3,760 hours per year over 1940-2025.
Are there tropical nights in El Grullo?
Yes: El Grullo has on average 6 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in El Grullo?
In El Grullo, between 1940 and 2025, the highest apparent temperature reached 40.0 °C on 8 June 1980, and the lowest was 0.1 °C on 11 January 1997.
Compare El Grullo with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around El Grullo