São Luís Weather in May
What's the weather like in São Luís (Maranhão) in May 2025?
The climate in São Luís during May can be summarized as hot, humid and very wet.
May is in the fall / autumn in São Luís and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a steamy 31°C (87°F), whilst at night 23°C (74°F) is normal.
| Daytime temperature | 30.5°C 86.9°F |
|---|---|
| Nightly temperature | 23.3°C 73.9°F |
| Average temperature | 26.9°C 80.4°F |
| Daily sunshine | 5.7 hrs |
| Avg rainfall | 294 mm 11.6 ins |
| Rainy days | 31 days |
| Sea temperature | 28.6°C 83.5°F |
| Humidity | 88% |
| Windspeed | 5kph 3 mph |
On average May is the 4th wettest month of the year in São Luís with around 294mm 11.6 inches of rain making it a very wet time to visit. This rainfall is typically spread over 31 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.7 hours of sunshine per day.
May temperatures in São Luís
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 São Luís in May 2025.
Other monthly averages
São Luís weather stats
| Hottest month: | November | 31.8°C 89.2°F |
|---|---|---|
| Driest month: | October | 10mm 0.4ins |
| Sunniest month: | August | 9hrs |
| Coldest month: | March | 29.7°C 85.5°F |
| Wettest month: | April | 431mm 17ins |
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