Guaymas climate — normals and trends
Guaymas (Mexico) has a hot desert climate (BWh) under the Köppen-Geiger classification. Its mean annual temperature is 24.3 °C and it receives 133 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 August (31.4 °C on average) and the coldest is January (16.9 °C). Rainfall peaks in September.
Guaymas averages 0 frost days, 168 hot days (≥ 30 °C) and 20 rainy days per year.
Guaymas has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.
The hottest day of the period reached 46.4 °C (on 31 July 1948) and the coldest 2.6 °C (on 3 February 2011).
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
GuaymasSonora
- coords
- 27.92°, -110.90°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
24.3°C
Average daily high
28.7°C
Average daily low
20.0°C
Annual rainfall
133mm
Sunshine / day
11.4h
Mean relative humidity
59%
Average peak wind
20.3km/h
Seasonal range
14.5°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
168 d/yr
Rainy days (≥ 1 mm)
20 d/yr
Annual snowfall
0.0 cm
Average feels-like high
29.1 °C
Average feels-like low
20.8 °C
Average peak gust
36.4 km/h
Tropical nights (≥ 20 °C)
175 d/yr
Solar radiation
21.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.42 · 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
46.4 °C
31 July 1948
Coldest day
2.6 °C
3 February 2011
Wettest day
120 mm
3 September 2009
Windiest day
75.1 km/h
6 September 2016
Strongest gust
139.3 km/h
6 September 2016
Hottest feels-like
46.9 °C
27 August 1981
Coldest feels-like
-5.8 °C
3 February 2011
Sunniest day
13.2 h
31 May 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 | 22.1 °C | +0.1 °C | 0 mm | -9 mm |
| Feb | 25.5 °C | +2.4 °C | 0 mm | -8 mm |
| Mar | 26.0 °C | +1.2 °C | 0 mm | -5 mm |
| Apr | 28.2 °C | +0.7 °C | 0 mm | -1 mm |
| May | 30.4 °C | +0.1 °C | 0 mm | -0 mm |
| Jun | 33.6 °C | +0.4 °C | 1 mm | +0 mm |
| Jul | 34.6 °C | 0.0 °C | 0 mm | -9 mm |
| Aug | 35.7 °C | +1.1 °C | 2 mm | -23 mm |
| Sep | 33.9 °C | +0.1 °C | 118 mm | +80 mm |
| Oct | 32.1 °C | +0.9 °C | 39 mm | +26 mm |
| Nov | 28.6 °C | +2.0 °C | 4 mm | -6 mm |
| Dec | 26.7 °C | +3.9 °C | 1 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 Guaymas?
Guaymas has a hot desert climate (Köppen BWh). Over 1940-2025, the average annual temperature is 24.3 °C and it receives 133 mm of precipitation per year.
What is the hottest day ever recorded in Guaymas?
The hottest day measured in Guaymas between 1940 and 2025 was 31 July 1948, reaching 46.4 °C.
What is the coldest day in Guaymas?
The coldest day measured in Guaymas between 1940 and 2025 was 3 February 2011, at 2.6 °C.
Does it snow in Guaymas?
Almost never: Guaymas sees virtually no snow, with about 0 frost days per year.
Has the climate of Guaymas warmed?
Yes: Guaymas warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Guaymas?
The wettest day measured in Guaymas between 1940 and 2025 was 3 September 2009, with 120 mm of rain in 24 hours.
What was the windiest day in Guaymas?
The windiest day measured in Guaymas between 1940 and 2025 was 6 September 2016, with winds reaching 75.1 km/h.
What is the warmest month in Guaymas?
The warmest month in Guaymas is August (31.4 °C on average); the coldest is January (16.9 °C).
How much does it rain in Guaymas?
Guaymas receives on average 133 mm of precipitation per year, spread over about 20 rainy days.
Is it sunny in Guaymas?
Guaymas gets on average 11.4 hours of sunshine per day, roughly 4,161 hours per year over 1940-2025.
Are there tropical nights in Guaymas?
Yes: Guaymas has on average 175 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Guaymas?
In Guaymas, between 1940 and 2025, the highest apparent temperature reached 46.9 °C on 27 August 1981, and the lowest was -5.8 °C on 3 February 2011.
Compare Guaymas with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Guaymas