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Hermosillo Weather by Month
Average temperatures, rainfall and humidity for Hermosillo, Mexico, month by month, built from OpenWeather’s historical records. Use it to see what a typical Hermosillo month looks like before you travel — then check the live Hermosillo forecast for the days ahead.
Warmest month
June
40°C average high
Coolest month
January
9°C average low
Wettest month
October
100 mm of rain
Driest month
May
0 mm of rain
Average temperature and rainfall in Hermosillo by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 26°C | 9°C | -4°C / 35°C | 6 mm | 44% | 7 km/h |
| February | 28°C | 11°C | -1°C / 38°C | 6 mm | 40% | 8 km/h |
| March | 30°C | 13°C | 4°C / 41°C | 6 mm | 35% | 9 km/h |
| April | 33°C | 16°C | 6°C / 41°C | 5 mm | 29% | 9 km/h |
| May | 35°C | 19°C | 7°C / 42°C | 0 mm | 29% | 10 km/h |
| June | 40°C | 24°C | 15°C / 48°C | 6 mm | 35% | 11 km/h |
| July | 40°C | 27°C | 21°C / 47°C | 31 mm | 50% | 11 km/h |
| August | 39°C | 27°C | 19°C / 44°C | 34 mm | 55% | 9 km/h |
| September | 37°C | 25°C | 12°C / 45°C | 31 mm | 57% | 9 km/h |
| October | 35°C | 19°C | 8°C / 44°C | 100 mm | 46% | 8 km/h |
| November | 30°C | 14°C | 3°C / 40°C | 5 mm | 41% | 7 km/h |
| December | 26°C | 11°C | -2°C / 34°C | 2 mm | 45% | 7 km/h |
Best time to visit Hermosillo
The most comfortable time to visit Hermosillo is generally December to February, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around October, totalling about 232 mm a year.
Travellers who prefer heat should aim for June, when highs average 40°C. October is the month to avoid if rain would spoil your plans — it averages 100 mm, roughly 100× the rainfall of the driest month (May).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Hermosillo forecast for what is happening now.