San Antonio Weather & Climate: Best Time to Visit

In San Antonio temperatures are generally consistent throughout the year. Average daytime temperatures reach a comfortable 27°C (81°F) in April. In January, the coolest month of the year, temperatures drop to a comfortable 25°C (77°F).

At night, temperatures range from around 18°C (64°F) in April to 16°C (61°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

San Antonio experiences significant rainfall throughout the year, averaging 3059 mm (120 in) of precipitation annually. San Antonio can be quite wet during October, receiving approximately 467 mm (18 in) of precipitation over 23 rainy days.

In contrast, during the driest month (March), you will experience much drier conditions, with 43 mm (1.7 in) of precipitation spread across 8 rainy days days. For more details, please visit our San Antonio Precipitation page.

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

The average number of days each month with precipitation

San Antonio can be enjoyed more throughout the sunniest month of March under a blue sky, with approximately 9.5 hours of sunshine daily. In contrast, the city experiences much darker days in June, with only 4.8 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in San Antonio.

The city experiences its highest humidity in October, reaching 87%. In March, the humidity drops to its lowest level at 66%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year