Ciudad Obregón climate — normals and trends
Ciudad Obregón (Mexico) has a hot desert climate (BWh) under the Köppen-Geiger classification. Its mean annual temperature is 24.5 °C and it receives 290 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 July (31.8 °C on average) and the coldest is January (16.8 °C). Rainfall peaks in August.
Ciudad Obregón averages 0 frost days, 249 hot days (≥ 30 °C) and 44 rainy days per year.
Ciudad Obregón has warmed by +0.9 °C between 1940 and 2025, or +0.11 °C per decade. This trend is statistically significant.
The hottest day of the period reached 46.2 °C (on 9 July 1947) and the coldest -0.1 °C (on 5 January 1949).
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
Ciudad ObregónSonora
- coords
- 27.49°, -109.94°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
24.5°C
Average daily high
32.8°C
Average daily low
17.5°C
Annual rainfall
290mm
Sunshine / day
11.2h
Mean relative humidity
54%
Average peak wind
13.3km/h
Seasonal range
15.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
249 d/yr
Rainy days (≥ 1 mm)
44 d/yr
Annual snowfall
0.0 cm
Average feels-like high
33.7 °C
Average feels-like low
18.0 °C
Average peak gust
31.7 km/h
Tropical nights (≥ 20 °C)
138 d/yr
Solar radiation
21.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.9 °C
since 1940
+0.1 °C per decade · r² = 0.20 · 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
46.2 °C
9 July 1947
Coldest day
-0.1 °C
5 January 1949
Wettest day
142 mm
5 September 2007
Windiest day
47.5 km/h
24 July 1948
Strongest gust
101.5 km/h
5 September 2007
Hottest feels-like
51.9 °C
11 August 2012
Coldest feels-like
-4.0 °C
4 February 2011
Sunniest day
13.3 h
3 June 1940
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 | 25.5 °C | -0.1 °C | 0 mm | -16 mm |
| Feb | 30.8 °C | +3.7 °C | 0 mm | -12 mm |
| Mar | 30.8 °C | +1.5 °C | 0 mm | -7 mm |
| Apr | 33.6 °C | +0.9 °C | 0 mm | -1 mm |
| May | 35.9 °C | 0.0 °C | 0 mm | -0 mm |
| Jun | 38.7 °C | +0.1 °C | 15 mm | +10 mm |
| Jul | 38.5 °C | +0.2 °C | 22 mm | -26 mm |
| Aug | 38.6 °C | +1.3 °C | 55 mm | -24 mm |
| Sep | 35.6 °C | -1.3 °C | 153 mm | +89 mm |
| Oct | 35.3 °C | +0.3 °C | 33 mm | +7 mm |
| Nov | 32.4 °C | +2.1 °C | 4 mm | -11 mm |
| Dec | 30.5 °C | +4.2 °C | 1 mm | -16 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 Ciudad Obregón?
Ciudad Obregón has a hot desert climate (Köppen BWh). Over 1940-2025, the average annual temperature is 24.5 °C and it receives 290 mm of precipitation per year.
What is the hottest day ever recorded in Ciudad Obregón?
The hottest day measured in Ciudad Obregón between 1940 and 2025 was 9 July 1947, reaching 46.2 °C.
What is the coldest day in Ciudad Obregón?
The coldest day measured in Ciudad Obregón between 1940 and 2025 was 5 January 1949, at -0.1 °C.
Does it snow in Ciudad Obregón?
Almost never: Ciudad Obregón sees virtually no snow, with about 0 frost days per year.
Has the climate of Ciudad Obregón warmed?
Yes: Ciudad Obregón warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ciudad Obregón?
The wettest day measured in Ciudad Obregón between 1940 and 2025 was 5 September 2007, with 142 mm of rain in 24 hours.
What was the windiest day in Ciudad Obregón?
The windiest day measured in Ciudad Obregón between 1940 and 2025 was 24 July 1948, with winds reaching 47.5 km/h.
What is the warmest month in Ciudad Obregón?
The warmest month in Ciudad Obregón is July (31.8 °C on average); the coldest is January (16.8 °C).
How much does it rain in Ciudad Obregón?
Ciudad Obregón receives on average 290 mm of precipitation per year, spread over about 44 rainy days.
Is it sunny in Ciudad Obregón?
Ciudad Obregón gets on average 11.2 hours of sunshine per day, roughly 4,088 hours per year over 1940-2025.
Are there tropical nights in Ciudad Obregón?
Yes: Ciudad Obregón has on average 138 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Ciudad Obregón?
In Ciudad Obregón, between 1940 and 2025, the highest apparent temperature reached 51.9 °C on 11 August 2012, and the lowest was -4.0 °C on 4 February 2011.
Compare Ciudad Obregón with another city
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Nearby cities
The climate around Ciudad Obregón