Ario de Rosales climate — normals and trends
Ario de Rosales (Mexico) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 18.4 °C and it receives 1,799 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 (21.3 °C on average) and the coldest is January (15.4 °C). Rainfall peaks in August.
Ario de Rosales averages 0 frost days, 12 hot days (≥ 30 °C) and 165 rainy days per year.
Ario de Rosales 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 33.5 °C (on 16 May 1986) and the coldest 1.9 °C (on 22 December 1999).
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
Ario de RosalesMichoacán
- coords
- 19.21°, -101.71°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
18.4°C
Average daily high
24.8°C
Average daily low
12.3°C
Annual rainfall
1,799mm
Sunshine / day
10.2h
Mean relative humidity
69%
Average peak wind
10.8km/h
Seasonal range
5.9°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
12 d/yr
Rainy days (≥ 1 mm)
165 d/yr
Annual snowfall
0.0 cm
Average feels-like high
25.8 °C
Average feels-like low
11.4 °C
Average peak gust
33.8 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
19.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.87 · 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
33.5 °C
16 May 1986
Coldest day
1.9 °C
22 December 1999
Wettest day
232 mm
18 August 2012
Windiest day
28.7 km/h
8 October 1976
Strongest gust
88.9 km/h
8 October 1976
Hottest feels-like
35.4 °C
31 May 1985
Coldest feels-like
-2.7 °C
25 February 1976
Sunniest day
12.8 h
25 June 1945
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 24.2 °C | +1.3 °C | 38 mm | +20 mm |
| Feb | 26.7 °C | +2.3 °C | 2 mm | -6 mm |
| Mar | 28.4 °C | +2.1 °C | 0 mm | -7 mm |
| Apr | 28.9 °C | +0.7 °C | 0 mm | -6 mm |
| May | 29.2 °C | +0.9 °C | 41 mm | -2 mm |
| Jun | 25.0 °C | -0.1 °C | 550 mm | +250 mm |
| Jul | 25.5 °C | +1.4 °C | 373 mm | -24 mm |
| Aug | 25.2 °C | +1.1 °C | 334 mm | -69 mm |
| Sep | 25.7 °C | +1.8 °C | 351 mm | -41 mm |
| Oct | 25.5 °C | +1.6 °C | 289 mm | +106 mm |
| Nov | 25.4 °C | +1.8 °C | 8 mm | -27 mm |
| Dec | 25.0 °C | +2.0 °C | 14 mm | +6 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 Ario de Rosales?
Ario de Rosales has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 18.4 °C and it receives 1,799 mm of precipitation per year.
What is the hottest day ever recorded in Ario de Rosales?
The hottest day measured in Ario de Rosales between 1940 and 2025 was 16 May 1986, reaching 33.5 °C.
What is the coldest day in Ario de Rosales?
The coldest day measured in Ario de Rosales between 1940 and 2025 was 22 December 1999, at 1.9 °C.
Does it snow in Ario de Rosales?
Almost never: Ario de Rosales sees virtually no snow, with about 0 frost days per year.
Has the climate of Ario de Rosales warmed?
Yes: Ario de Rosales warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ario de Rosales?
The wettest day measured in Ario de Rosales between 1940 and 2025 was 18 August 2012, with 232 mm of rain in 24 hours.
What was the windiest day in Ario de Rosales?
The windiest day measured in Ario de Rosales between 1940 and 2025 was 8 October 1976, with winds reaching 28.7 km/h.
What is the warmest month in Ario de Rosales?
The warmest month in Ario de Rosales is May (21.3 °C on average); the coldest is January (15.4 °C).
How much does it rain in Ario de Rosales?
Ario de Rosales receives on average 1,799 mm of precipitation per year, spread over about 165 rainy days.
Is it sunny in Ario de Rosales?
Ario de Rosales gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.
Are there tropical nights in Ario de Rosales?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Ario de Rosales.
What was the most extreme apparent temperature in Ario de Rosales?
In Ario de Rosales, between 1940 and 2025, the highest apparent temperature reached 35.4 °C on 31 May 1985, and the lowest was -2.7 °C on 25 February 1976.
Compare Ario de Rosales with another city
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Nearby cities
The climate around Ario de Rosales