São Luís Weather & Climate: Best Time to Visit

The temperature in São Luís remains steady throughout the year, providing a consistently very warm climate. Average daytime temperatures reach a very warm 31°C (88°F) in August. In March, the coolest month of the year, temperatures drop to a comfortable 29°C (84°F).

At night, temperatures range from around 26°C (79°F) in August to 25°C (77°F) in March.

Check out our detailed temperature page for more information.

Temperature ranges by month

São Luís has a relatively rainy climate with high precipitation levels, averaging 2171 mm (85 in) of rainfall annually. São Luís can be quite wet during March, receiving approximately 434 mm (17 in) of precipitation over 31 rainy days.

In contrast, during the driest month (September), you will experience much drier conditions, with 18 mm (0.7 in) of precipitation spread across 6 rainy days days. For more details, please visit our São Luís Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

São Luís can be enjoyed more throughout the sunniest month of August under a blue sky, with approximately 8.7 hours of sunshine daily. In contrast, the city experiences much darker days in March, with only 3.6 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The city experiences its highest humidity in April, reaching 90%. In November, the humidity drops to its lowest level at 79%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year