San Antonio weather by month
San Antonio runs from an average daily high of 63°F in January to 96°F in August, with overnight lows between 41°F (January) and 75°F (August).
May is the wettest month (4.4 inches) and February the driest (1.7 inches); about 32 inches fall in a normal year.
Average highs reach 90°F or more in Jun-Sep.
The best months for most visitors are Mar-May and Oct-Nov.
Month by month in San Antonio
| Month | Average high | Average low | Rain (in) |
|---|---|---|---|
| January | 63°F | 41°F | 2.0 |
| February | 68°F | 45°F | 1.7 |
| March best | 74°F | 52°F | 2.3 |
| April best | 80°F | 58°F | 2.4 |
| May best | 87°F | 66°F | 4.4 |
| June | 92°F | 73°F | 3.3 |
| July | 95°F | 75°F | 2.4 |
| August | 96°F | 75°F | 2.1 |
| September | 90°F | 70°F | 3.9 |
| October best | 82°F | 60°F | 3.8 |
| November best | 72°F | 50°F | 2.1 |
| December | 65°F | 42°F | 2.0 |
The numbers are from NOAA's station at San Antonio Airport (USW00012921). Climate normals 1991-2020: long-run averages, not a forecast.
Questions about San Antonio weather
What is the best time to visit San Antonio?
The best months for most visitors are Mar-May and Oct-Nov. Best: Mar–May. Best: Oct–Nov. Hot: Jun–Sep.
What is the hottest and coldest month in San Antonio?
August is the hottest (average high 96°F) and January the coolest (average low 41°F).
When does it rain the most in San Antonio?
May is the wettest month (4.4 inches) and February the driest (1.7 inches).
Does it snow in San Antonio?
The station does not record snowfall as a normal; check the forecast for mountain areas.
Where do these weather numbers come from?
The numbers are from NOAA's station at San Antonio Airport (USW00012921). They are 1991-2020 climate normals (long-run averages), not a forecast. For today's weather use the National Weather Service forecast.