Bexar County · Texas
San Antonio, TX weather averages
NOAA climate normals for 1991-2020, measured at San Antonio Intl Ap, 9.4 km from the city centre — month by month temperature, rain and snow.
Quick answer
San Antonio averages a daily high of 80.3°F and a daily low of 58.7°F across the year, with 32.27 inches of precipitation. August is the warmest month at 96°F and January the coldest at 40.7°F.
- Average annual high
- 80.3°FWarmest month August
- Average annual low
- 58.7°FColdest month January
- Precipitation per year
- 32.27 inWettest month June
- Snowfall per year
- 0.7 in15.5 days at or below 32°F
San Antonio weather month by month
Normal daily high and low, precipitation and snowfall for each month, 1991-2020.
| Month | High °F | Low °F | Precip in | Snow in | Range |
|---|---|---|---|---|---|
| January | 62.9 | 40.7 | 1.76 | 0.7 | 40.7 to 62.9 degrees |
| February | 66.9 | 44.2 | 1.79 | 0 | 44.2 to 66.9 degrees |
| March | 73.5 | 50.8 | 2.31 | 0 | 50.8 to 73.5 degrees |
| April | 80.5 | 58.1 | 2.1 | 0 | 58.1 to 80.5 degrees |
| May | 87 | 66.8 | 4.01 | 0 | 66.8 to 87 degrees |
| June | 92.3 | 72.6 | 4.14 | 0 | 72.6 to 92.3 degrees |
| July | 94.6 | 74.6 | 2.74 | 0 | 74.6 to 94.6 degrees |
| August | 96 | 74.7 | 2.09 | 0 | 74.7 to 96 degrees |
| September | 90.3 | 69.1 | 3.03 | 0 | 69.1 to 90.3 degrees |
| October | 82.2 | 60.1 | 4.11 | 0 | 60.1 to 82.2 degrees |
| November | 72.2 | 50.1 | 2.28 | 0 | 50.1 to 72.2 degrees |
| December | 64 | 41.7 | 1.91 | 0 | 41.7 to 64 degrees |
Source: NOAA NCEI, U.S. Climate Normals 1991-2020 — station USW00012921, San Antonio Intl Ap · rates as published for 1991-2020 normals
How to read San Antonio climate normals
What a climate normal is, and what it is not.
A normal is the average of thirty years of daily observations at one station — here San Antonio Intl Ap, 9.4 km from the centre of San Antonio. It describes a typical year, so any single year will run warmer, cooler, wetter or drier. Readings taken at an airport on the edge of town usually sit a degree or two below a dense downtown on summer nights. San Antonio sees about 110.6 days a year at or above 90°F and about 46.3 days with a tenth of an inch of precipitation or more.
Keep going
Other San Antonio data on this site.