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United StatesThe weather in May in San Antonio
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.
Looking for sun? May isn’t a good month to be in San Antonio. The temperature is nice, but there’s too much chance of rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in May for San Antonio, Texas. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 40°C in 2022, San Antonio reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 19°C in 2014. The extreme nighttime temperatures ranged from a lowest recorded value of 9°C to a highest value of 27°C.
Rainfall amount
In May, there is an average of 124 mm of precipitation, spread over 15 days. The wind speed is around 4 Bft, mostly coming from the Southeast.
Daily weather in May for San Antonio
Click on any day in May to get detailed info about the usual weather on that day in San Antonio. Check out the historical temperatures and precipitation over the past 10 years on this day.
May weather comparison
| San Antonio | New York | |
|---|---|---|
| Average temperature | 31°C | 22°C |
| Max. temperature | 33°C | 28°C |
| Min. temperature | 17°C | -5°C |
| Total precipitation | 124 mm | 105 mm |
| Rainy days | 15 days | 14 days |
Start of May
The month of May starts in San Antonio with hot temps, averaging around 31°C during the day and nights around 20°C.
Mid May
By mid-May, daytime temps stay steady at around 31°C, with nights around 21°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of May
By the end of May, the average daytime temperature in San Antonio is around 33°C, while nighttime temps are about 23°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
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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.
The hurricane season in San Antonio runs from June to November.
Check out the climate of San Antonio for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in May in San Antonio, Texas. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in May in San Antonio
Temperature in May in San Antonio over the years
Precipitation charts
These charts show the average amount of precipitation in May in San Antonio, Texas. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in May in San Antonio
Total precipitation in May in San Antonio over the years
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.
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.