San Luis Potosí Weather & Climate: Best Time to Visit

The weather in San Luis Potosí changes moderately throughout the year, offering enough variation to appreciate each season. Average daytime temperatures reach a comfortable 30°C (86°F) in May. In January, the coolest month of the year, temperatures drop to a pleasant 21°C (70°F).

At night, temperatures range from around 15°C (59°F) in May to 6°C (43°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Generally, San Luis Potosí receives mid-range precipitation levels, with 585 mm (23 in) annually. San Luis Potosí can be quite wet during September, receiving approximately 102 mm (4 in) of precipitation over 7 rainy days.

In contrast, during the driest month (December), you will experience much drier conditions, with 12 mm (0.5 in) of precipitation spread across 2 rainy days days. For more details, please visit our San Luis Potosí Precipitation page.

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

The average number of days each month with precipitation

San Luis Potosí experiences moderate variation in sunshine hours across the seasons. With 9.4 hours daily sunshine in May, it dips to 6.5 hours in September, offering a balanced mix of sunny and overcast days.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is moderate throughout the year in San Luis Potosí.

The city experiences its highest humidity in September, reaching 69%. In March, the humidity drops to its lowest level at 44%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year