San Antonio Weather in May

San Antonio in May sees high daytime temperatures of 26°C (79°F) and nighttime lows of 18°C (64°F). As part of the rainy season, showers are frequent and often heavy. Budget around 366 mm (14 in) of rainfall for the month.

Rainfall in San Antonio in May

As part of the rainy season, San Antonio sees around 19 days of rain in May, with an average of 366 mm (14 in). Rain during the rainy season here tends to be intense rather than just persistent drizzle. Expect significant downpours.

Temperature in San Antonio in May

Expect highs of 26°C (79°F) in San Antonio in May, with nights dropping to around 18°C (64°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With overnight lows of 18°C (64°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 area enjoys a balanced 183 hours of sunlight, ensuring it's neither too rainy nor too sunny.

May in San Antonio has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.