Temperatures in May
It's hot in May in San Antonio with an average temperature of 31°C. Temperatures this month range from a low of 29°C to a high of 33°C. At night, you can expect temperatures between 17°C and 23°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for San Antonio in May. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of May
The month of May starts in San Antonio with hot temperatures, averaging around 31°C during the day and nights close to 20°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Since temperatures can differ between day and night, it’s a good idea to dress in layers.
Mid-May
By mid-May, the average daytime temperature stays the same at 31°C, with nights close to 21°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.
End of May
By the end of May, the average daytime temperature in San Antonio will be around 33°C, with nights close to 23°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
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Precipitation in May
In May, there is an average of 124 mm of precipitation, spread over 9 days. The wind speed is around 4 Bft, mostly coming from the Southeast.
The average precipitation chance is 27% per day this month. Though it seems pretty low, the weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in May for San Antonio. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
San Antonio in May |
London | ||
|---|---|---|---|
 Average Temperature |
31°C | 18°C | |
 High Temp |
33°C | 21°C | |
| Low Temp |
29°C | 15°C | |
 Total Precipitation |
124 mm | 46 mm | |
| Rainy Days |
9 days | 8 days | |
April
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is May a good time to visit San Antonio?
After some sun? Then May isn’t the best time to be in San Antonio. The temperature is pleasant, but there’s too much chance of rain this month.
The hurricane season in San Antonio runs from June to November.
Temperature records for San Antonio in May
With 40°C, San Antonio hit the highest temperature in the last 10 years in May 2022. The lowest daytime temperature in this month was 19°C in 2014. The extreme night temperatures ranged from a low of 9°C to a high of 27°C.
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Daily Temperature in May in San Antonio
This chart shows the average daily temperatures, both day and night, for each day in May in San Antonio, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in May in San Antonio
The chart below shows the average daily precipitation in May for San Antonio, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for May, you can expect around 9 days of rain in San Antonio.
Daily UV Index in May in San Antonio
This chart shows the average daily UV index in May in San Antonio, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in May in San Antonio Over the Years
This chart shows the average temperature in May in San Antonio, measured in degrees Celsius, over the past years.
Total Precipitation in May in San Antonio Over the Years
This chart shows the average precipitation in May in San Antonio, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in May for San Antonio
Click on a specific day in May for detailed info on the typical weather on that day in San Antonio. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May in San Antonio
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Average Weather in San Antonio by Month
Click on a month below to see detailed weather info for San Antonio. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of San Antonio for all months at once
