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 maximum daytime temperature in May in San Antonio86
    86°F max day temperature
  • 7 hours of sunshine per day
  • 8 days with some rainfall in May in San Antonio8
    8 days with some rainfall
  • 66°F minimum night-time temperature in May in San Antonio66
    66°F min night temperature
  • 14 hours of daylight per day in May in San Antonio14
    14 hours of daylight per day
  • High heat & humidity in May in San AntonioH
    High heat & humidity
  • 3.7 inches monthly rainfall in May in San Antonio3.7
    3.7 inches of monthly rainfall
  • UV (maximum) index 11 (Extreme) in May in San Antonio11
    11 (Extreme) UV index

More about San Antonio

San Antonio by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for San Antonio

Hostelworld: Top deals on accommodation

  • Explore cheap accommodation around the world
  • Choose from over 36,000 properties across the globe
  • Get instant confirmation & 24/7 customer service
Go to Hostelworld deal >>

View all Hostelworld offers

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)

Back to top

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

Related posts

Popular travel offers

Explore holiday destinations

More holidays

Save on travel with latest deals & discounts

More deals

Airport parking

More parking

Airport lounges

More lounges

Top ^