San Antonio Weather in May

May in San Antonio brings very high temperatures around 31°C (88°F) during the day, dropping to 19°C (66°F) at night, with the most rainfall of the year.

Rainfall in San Antonio in May

As the rainiest month, carrying an umbrella is advisable to manage the frequent rain. You can expect rain on around 9 days based on historical patterns, with 130 mm (5.1 in) average for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in San Antonio in May

May in San Antonio sees highs of 31°C (88°F) and lows of 19°C (66°F) overnight. The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. With overnight lows of 19°C (66°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in San Antonio in May

The city usually sees around 222 hours of sunlight, indicating many sunny days , a great month for sightseeing.

If you prefer dry days with pleasant temperatures, February, March, April, October and November typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.