San Antonio Weather in May

San Antonio in May sees moderate daytime temperatures of 17°C (63°F) and nighttime lows of 8°C (46°F). Low rainfall is typical, with around 29 mm (1.1 in) for the month.

Rainfall in San Antonio in May

Typically around 4 days of rainfall are expected, averaging 29 mm (1.1 in) for the month. When rain does fall, showers tend to be light and brief. Most days will be dry.

Temperature in San Antonio in May

May in San Antonio brings moderate temperatures, with highs of 17°C (63°F) and nights around 8°C (46°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights fall to 8°C (46°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.

Wind Speed in San Antonio in May

May sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.

Average water temperature in May

At 13°C (55°F), the water is cool but manageable for those who don't mind a bit of a shock getting in. Most people adjust after a few minutes.

If you prefer dry days with pleasant temperatures, May may not be the ideal month to visit San Antonio. Our weather planner can help you explore destinations with more pleasant weather conditions.