The climate in Santa Rosa during May can be summarized as hot, humid and reasonably dry.
May is in the fall / autumn in Santa Rosa and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a steamy 30°C (86°F), whilst at night 22°C (71°F) is normal.
Daytime temperature | 30°C 86°F |
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Nightly temperature | 21.6°C 70.9°F |
Average temperature | 25.8°C 78.4°F |
Daily sunshine | 5.3 hrs |
Avg rainfall | 42 mm 1.6 ins |
Rainy days | 7 days |
Sea temperature | 23.7°C 74.6°F |
Humidity | 85% |
Windspeed | 13.7kph 9 mph |
On average May is the 5th wettest month of the year in Santa Rosa with around 42mm 1.6 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.3 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Santa Rosa in May 2025.
Hottest month: | March | 30.9°C 87.6°F |
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Driest month: | August | 14mm 0.6ins |
Sunniest month: | December | 5.9hrs |
Coldest month: | August | 27.3°C 81.1°F |
Wettest month: | March | 143mm 5.6ins |