Weather in San Antonio in May 2025
- May is usually the wettest month of the year in San Antonio;
Average weather
Average temperature in San Antonio in May
Going from a maximum of +93°F during the day to a minimum of +59°F during the night, the temperature in May averages around +86°F.
The average maximum temperature goes up 16% by the end of the month, compared with the beginning of the month, from +84°F to +90°F.
Is San Antonio warm or cold in May?
San Antonio is typically hot in May.
Maximum temperatures go up compared to the previous month from +82°F to +88°F. The minimum temperature also goes up from +61°F to +68°F.
Make sure that you pack your summer linen and swimming costumes; it’s probably going to be hot.
Take a look at how May is compared to other months in San Antonio:
Climate in San Antonio in May
| April | May | June | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +82°F | +88°F | +93°F | ||||
| Min. temperature | ||||||
| +32°F | +43°F | +57°F | ||||
| Max. temperature | ||||||
| +100°F | +102°F | +109°F | ||||
| Rainfall | ||||||
| 76 mm | 132 mm | 89 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 3 m/s | ||||
| Humidity | ||||||
| 69% | 73% | 71% | ||||
| Air pressure | ||||||
| 1013 HPa | 1012 HPa | 1012 HPa | ||||
| Sunny days | ||||||
| 8 | 5 | 6 | ||||
| Cloudy days | ||||||
| 8 | 8 | 8 | ||||
| Rainy days | ||||||
| 13 | 16 | 14 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
May weather is still as good as in April. It’s getting warmer as May arrives. The average maximum temperature goes up from +82°F to +88°F during the day. Prepare for more rain. Average rainfall goes from 76 mm to 132 mm. Humidity rises from 69% to 73%. The average wind speed doesn’t change much during May, staying around 4 m/s. The days becoming less sunny, going from 8 sunny days in April to 5 in May.
Next month (June) brings a further decline in the weather.
Wind
The average wind speed is 3 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in San Antonio is gradually decreasing during May, going from 4 m/s to 3 m/s over the course of the month.
Rain
How was the weather last May in San Antonio?
Climate Change Over the Years
The climate in San Antonio in May has not changed that much over the last 43 years.
The average temperature was the lowest in 1983 (+77°F) and the highest in 2006 (+85°F). The driest year was 1996 with only 401 mm of rainfall, and the wettest year was 2007 with 1606 mm.
FAQ
Is May a good time to visit San Antonio?
Can you sunbathe in San Antonio in May?
Is San Antonio rainy in May?
Is it sunny in San Antonio in May?
Other cities in USA
Monthly weather in San Antonio
Source of the data
For this page, we’ve looked at the typical weather in San Antonio, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.