Santa Rosa Weather in May
What's the weather like in Santa Rosa (El Oro) in May 2026?
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 |
|---|---|
| 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.
May temperatures in Santa Rosa
May rainfall
May hourly sunshine
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.
Other monthly averages
Santa Rosa weather stats
| Hottest month: | March | 30.9°C 87.6°F |
|---|---|---|
| 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 |
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