San Antonio Weather in May

May in San Antonio brings high temperatures, with highs of 24°C (75°F) and nights dropping to 17°C (63°F). With excellent weather conditions overall, it's a good time to visit.

Rainfall in San Antonio in May

On average, there are about 8 days with rain during this month, averaging 22 mm (0.9 in). Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.

Temperature in San Antonio in May

The temperature in San Antonio in May is excellent. Daytime highs reach 24°C (75°F), with nights dropping to 17°C (63°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. With overnight lows of 17°C (63°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

There are approximately 275 hours of sunshine this month, resulting in mostly clear days.

Average water temperature in May

At 19°C (66°F), the water is getting there, comfortable enough for most swimmers, though those used to warmer seas may still find it a touch cool.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. March, April, May, June, September, October and November typically offer the best weather for San Antonio.