San Antonio Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from comfortable to moderate in San Antonio. Typically, average maximum daytime temperatures range from a comfortable 29°C (84°F) in January to a moderate 14°C (57°F) in the coolest month, July.

Nights vary from 18°C (64°F) in January to around 4°C (39°F) during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

With annual rainfall averaging 311 mm (12 in), San Antonio maintains relatively low precipitation levels throughout the seasons. San Antonio offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between the wettest month March (33 mm (1.3 in)) and the driest month December (17 mm (0.7 in)) is not too significant. 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

The mean water temperature over the year ranges from 10°C (50°F) in August to 18°C (64°F) in January.

Water temperature over the year

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

The city experiences its highest humidity in June, reaching 69%. In January, the humidity drops to its lowest level at 47%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year

The average wind speed over the year ranges from 3 m/s (6 knots) to 5 m/s (10 knots). It is lower in April and higher in January, November and December. What does this mean?

The mean monthly wind speed over the year (meters per second)