Climate averages 1991–2020
San Antonio weather
in July.
A very hot, moderately wet month: the 2nd warmest and one of the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a very hot month in San Antonio: daytime highs average 34.5°C and nights cool to about 24.1°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 50 mm of rain on roughly 6 days, which makes July a moderately wet month (one of the driest months of the year). Daylight, from sunrise to sunset, lasts about 13 h 50 min on an average July day.
The nearest other city in this atlas is New Braunfels (47 km away). In July its highs average 34.3°C, about as warm as San Antonio, with 45 mm of rain.
Among the 498 cities listed in the United States, San Antonio ranks joint 45th of 498 for the warmest July highs and joint 207th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; San Antonio is 4.2°C warmer than that mean.
From July to August, average highs rise by 0.6°C to 35.1°C, and monthly rainfall stays at 50 mm.
The annual picture
July in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
San Antonio climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 16.9°C6.7°C | 6.7°C | 57 | 7.2 | 10.510 h |
| February | 19.3°C8.7°C | 8.7°C | 59 | 7.5 | 11.111 h |
| March | 22.8°C12.1°C | 12.1°C | 79 | 9.2 | 12.012 h |
| April | 26.6°C15.7°C | 15.7°C | 78 | 8.5 | 12.913 h |
| May | 29.9°C19.9°C | 19.9°C | 103 | 11.2 | 13.614 h |
| June | 33.0°C23.1°C | 23.1°C | 69 | 9.5 | 14.014 h |
| July, selected | 34.5°C24.1°C | 24.1°C | 50 | 6.1 | 13.814 h |
| August | 35.1°C24.7°C | 24.7°C | 50 | 5.8 | 13.213 h |
| September | 31.6°C22.0°C | 22.0°C | 77 | 8.6 | 12.412 h |
| October | 27.3°C17.3°C | 17.3°C | 83 | 7.7 | 11.511 h |
| November | 21.5°C11.7°C | 11.7°C | 67 | 7.2 | 10.711 h |
| December | 17.5°C7.8°C | 7.8°C | 63 | 7.5 | 10.310 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- New Braunfels in JulyUnited States · 47 kmHigh 34.3°C · Low 24.0°C · 45 mm rain
- Austin in JulyUnited States · 118 kmHigh 34.6°C · Low 24.4°C · 42 mm rain
- Round Rock in JulyUnited States · 144 kmHigh 34.5°C · Low 24.2°C · 39 mm rain
- Killeen in JulyUnited States · 202 kmHigh 34.3°C · Low 24.3°C · 39 mm rain
- Corpus Christi in JulyUnited States · 210 kmHigh 32.4°C · Low 25.7°C · 58 mm rain
- Piedras Negras in JulyMexico · 213 kmHigh 36.6°C · Low 25.8°C · 50 mm rain
- Temple in JulyUnited States · 216 kmHigh 34.3°C · Low 24.3°C · 35 mm rain
- Ciudad Acuña in JulyMexico · 238 kmHigh 35.8°C · Low 25.6°C · 41 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for San Antonio) is explained once on the San Antonio year overview and on the Sources, method and limits page.