El Rosario climate — normals and trends
El Rosario (Mexico) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 23.3 °C and it receives 971 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 June (26.6 °C on average) and the coldest is January (19.0 °C). Rainfall peaks in August.
El Rosario averages 0 frost days, 147 hot days (≥ 30 °C) and 106 rainy days per year.
El Rosario has warmed by +1.0 °C between 1940 and 2025, or +0.12 °C per decade. This trend is statistically significant.
The hottest day of the period reached 37.4 °C (on 6 July 2018) and the coldest 4.4 °C (on 1 January 2021).
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 RosarioSinaloa
- coords
- 22.99°, -105.85°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
23.3°C
Average daily high
29.2°C
Average daily low
18.0°C
Annual rainfall
971mm
Sunshine / day
10.6h
Mean relative humidity
75%
Average peak wind
10.2km/h
Seasonal range
7.6°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
147 d/yr
Rainy days (≥ 1 mm)
106 d/yr
Annual snowfall
0.0 cm
Average feels-like high
32.6 °C
Average feels-like low
19.8 °C
Average peak gust
29.7 km/h
Tropical nights (≥ 20 °C)
150 d/yr
Solar radiation
20.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.0 °C
since 1940
+0.1 °C per decade · r² = 0.46 · 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
37.4 °C
6 July 2018
Coldest day
4.4 °C
1 January 2021
Wettest day
205 mm
15 September 1954
Windiest day
31.6 km/h
21 October 2009
Strongest gust
121.3 km/h
21 October 2009
Hottest feels-like
44.3 °C
9 July 1998
Coldest feels-like
0.2 °C
14 December 1997
Sunniest day
13.4 h
13 June 1941
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 | 26.5 °C | +0.3 °C | 41 mm | +14 mm |
| Feb | 29.3 °C | +2.1 °C | 0 mm | -14 mm |
| Mar | 29.4 °C | +0.9 °C | 0 mm | -8 mm |
| Apr | 30.3 °C | -0.2 °C | 0 mm | -2 mm |
| May | 32.9 °C | +0.8 °C | 12 mm | +9 mm |
| Jun | 31.8 °C | -0.3 °C | 175 mm | +115 mm |
| Jul | 31.5 °C | +1.1 °C | 211 mm | -22 mm |
| Aug | 30.9 °C | +1.2 °C | 209 mm | -54 mm |
| Sep | 30.8 °C | +1.3 °C | 246 mm | +19 mm |
| Oct | 30.6 °C | +1.3 °C | 92 mm | +8 mm |
| Nov | 30.0 °C | +1.6 °C | 0 mm | -22 mm |
| Dec | 29.3 °C | +2.5 °C | 4 mm | -24 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 Rosario?
El Rosario has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 23.3 °C and it receives 971 mm of precipitation per year.
What is the hottest day ever recorded in El Rosario?
The hottest day measured in El Rosario between 1940 and 2025 was 6 July 2018, reaching 37.4 °C.
What is the coldest day in El Rosario?
The coldest day measured in El Rosario between 1940 and 2025 was 1 January 2021, at 4.4 °C.
Does it snow in El Rosario?
Almost never: El Rosario sees virtually no snow, with about 0 frost days per year.
Has the climate of El Rosario warmed?
Yes: El Rosario warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in El Rosario?
The wettest day measured in El Rosario between 1940 and 2025 was 15 September 1954, with 205 mm of rain in 24 hours.
What was the windiest day in El Rosario?
The windiest day measured in El Rosario between 1940 and 2025 was 21 October 2009, with winds reaching 31.6 km/h.
What is the warmest month in El Rosario?
The warmest month in El Rosario is June (26.6 °C on average); the coldest is January (19.0 °C).
How much does it rain in El Rosario?
El Rosario receives on average 971 mm of precipitation per year, spread over about 106 rainy days.
Is it sunny in El Rosario?
El Rosario gets on average 10.6 hours of sunshine per day, roughly 3,869 hours per year over 1940-2025.
Are there tropical nights in El Rosario?
Yes: El Rosario has on average 150 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in El Rosario?
In El Rosario, between 1940 and 2025, the highest apparent temperature reached 44.3 °C on 9 July 1998, and the lowest was 0.2 °C on 14 December 1997.
Compare El Rosario with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around El Rosario