San Antonio Weather in December

Thinking of visiting San Antonio in December? Expect high temperatures reaching 27°C (81°F) during the day, dropping to 16°C (61°F) at night, with the driest conditions of the year.

Rainfall in San Antonio in December

With the least rainfall of the year, this month offers good conditions for outdoor exploration. Take advantage of the dry weather to plan your activities. Typically, you can expect about 4 days of rain this month, with 17 mm (0.7 in) on average. Rain days are few and the total is low, so this is a largely dry month. Any showers that do occur tend to be brief.

Temperature in San Antonio in December

San Antonio has excellent weather in December, with days reaching 27°C (81°F) and nights cooling to 16°C (61°F). During December, you'll experience the summer season. This kind of day-to-night contrast is typical for this time of year. Nights cool down to 16°C (61°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Wind Speed in San Antonio in December

Average wind conditions reach 5 m/s (10 knots) in December. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.

Average water temperature in December

With water at 16°C (61°F), it's on the cooler side. Keen swimmers won't be put off, but those who prefer warm water may find it less enjoyable.

If you're inclined towards comfortable temperatures and drier conditions, December is a good time to visit San Antonio.