The climate in Santa Rosa during May can be summarized as hot, humid and damp.
May is in the fall / autumn in Santa Rosa and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a steamy 31°C (88°F), whilst at night 20°C (69°F) is normal.
Daytime temperature | 31.4°C 88.4°F |
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Nightly temperature | 20.3°C 68.5°F |
Average temperature | 25.8°C 78.4°F |
Daily sunshine | 7.1 hrs |
Avg rainfall | 102 mm 4 ins |
Rainy days | 5 days |
Sea temperature | 21°C 69.9°F |
Humidity | 76% |
Windspeed | 7.6kph 5 mph |
On average May is the 5th driest month of the year in Santa Rosa with around 102mm 4 inches of rain making it a damp time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.1 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: | October | 33.5°C 92.3°F |
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Driest month: | August | 56mm 2.2ins |
Sunniest month: | July | 8hrs |
Coldest month: | June | 29.7°C 85.5°F |
Wettest month: | February | 290mm 11.4ins |