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Climate · San Antonio

San Antonio in May

Hot and damp, as the days lengthen.

Typical weather, averaged over 30 years

May in San Antonio is hot: highs near 89°F, lows near 67°F. Rain falls on about three days a week, more often as the month goes on, and the days lengthen by 33 minutes from the first week to the last.May in San Antonio is hot: highs near 32°C, lows near 19°C. Rain falls on about three days a week, more often as the month goes on, and the days lengthen by 33 minutes from the first week to the last.

High
89°F32°Caverage
Low
67°F19°Caverage
Wet days
3a week · 40% of days
Daylight
13h 37mon average

Is May a good time to visit San Antonio?

May sits outside San Antonio's best months, which run in two parts: March, or November. Expect hot days and rain on about three days a week.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How May sits in the year

week by week

Temperature

Highs near 89°F in May, against 66°F to 99°F through the year.Highs near 32°C in May, against 19°C to 37°C through the year.

Chance of a wet day

40% of days in May, against 22% to 40% through the year.

Cloud cover

40% cover in May, against 31% to 50% through the year.

Daylight

13h 37m in May, against 10h 17m to 14h 00m through the year.

Week by week, lightly smoothed, with May shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. April83°28°low 60°low 16°2 wet days a weekRain on about two days a week.
  2. May89°32°low 67°low 19°3 wet days a weekRain on about three days a week.
  3. June95°35°low 73°low 23°2 wet days a weekRain on about two days a week.

Where San Antonio sits, in May

America/Chicago
this place
typical high in May 40°F4°C95°F35°C
Sunrise, mid-May
6:43 AMsets 8:19 PM
Above the sea
250 mlow-lying
Latitude
29.5°Nnorthern hemisphere
Nearest of ours
Houston322 km east

The land around San Antonio, shaded by its typical high in May, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in United States in May

high · low · wet days
See May on the planning mapThe whole year in San Antonio

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest San Antonio. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match.Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match. Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.