The climate in San Rafael during May can be summarized as warm, humid and very wet.
May is in the spring in San Rafael and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a muggy 26°C (78°F), whilst at night 16°C (61°F) is normal.
Daytime temperature | 25.7°C 78.2°F |
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Nightly temperature | 16.2°C 61.1°F |
Average temperature | 20.9°C 69.6°F |
Daily sunshine | 5.2 hrs |
Avg rainfall | 336 mm 13.2 ins |
Rainy days | 23 days |
Sea temperature | 28.1°C 82.6°F |
Humidity | 83% |
Windspeed | 11.2kph 7 mph |
On average May is the wettest month of the year in San Rafael with around 336mm 13.2 inches of rain making it a very wet time to visit. This rainfall is typically spread over 23 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.2 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 San Rafael in May 2025.
Hottest month: | March | 25.9°C 78.6°F |
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Driest month: | January | 77mm 3ins |
Sunniest month: | July | 7.2hrs |
Coldest month: | December | 24.8°C 76.6°F |
Wettest month: | May | 336mm 13.2ins |