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San Antonio weather in May 2026
Expect daytime maximum temperatures of 86°F in San Antonio, Texas in May and high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 3.7 inches of rainfall in the month.
- 86°F max day temperature
86
- 7 hours of sunshine per day
- 8 days with some rainfall
8
- 66°F min night temperature
66
- 14 hours of daylight per day
14
- High heat & humidity
H
- 3.7 inches of monthly rainfall
3.7
- 11 (Extreme) UV index
11
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The May weather guide for Texas (San Antonio) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C) | Imperial (°F)
More about the USA
How hot is it in San Antonio in May?
Daytime temperatures usually reach 86°F in San Antonio in May with high heat and humidity, falling to 66°F at night.
How sunny is it in San Antonio in May?
There are normally 7 hours of bright sunshine each day in San Antonio in May - that's 52% of daylight hours.
Does it rain in San Antonio in May?
There are usually 8 days with some rain in San Antonio in May and the average monthly rainfall is 3.7 inches.
San Antonio May sunrise & sunset times
Browse the sunrise and sunset times for San Antonio in May 2026. Select a month to view San Antonio sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Friday, 1st May 2026 | 05:52 | 19:11 |
Saturday, 16th May 2026 | 05:41 | 19:20 |
Sunday, 31st May 2026 | 05:35 | 19:29 |
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