San Antonio monthly weather averages
Average daytime temperature
The bar chart below shows the average monthly peak daytime temperatures at San Antonio
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 33.3 | 32.8 | 31.2 | 27.7 | 24.7 | 22.4 | 22.7 | 24.5 | 26.3 | 28.8 | 30.9 | 32.9 |
| °F | 92 | 91 | 88.2 | 81.8 | 76.4 | 72.3 | 72.9 | 76 | 79.3 | 83.8 | 87.6 | 91.2 |
Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.
Average rainfall & rainy days
The graph below shows the average rainfall and number of rainy days per month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | 152 | 135 | 131 | 149 | 117 | 77 | 54 | 59 | 82 | 137 | 161 | 147 |
| inches | 6 | 5.3 | 5.1 | 5.9 | 4.6 | 3 | 2.1 | 2.3 | 3.2 | 5.4 | 6.3 | 5.8 |
| Rainy days | 7 | 6 | 6 | 7 | 6 | 6 | 4 | 5 | 6 | 7 | 7 | 7 |
Average annual rainfall in San Antonio: 1317.9mm (518.9 inches)
Average daily sunshine
The bar chart below shows the average daily sunshine hours in San Antonio
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hrs sunshine | 9.3 | 9.1 | 8.5 | 7.9 | 7.1 | 5.9 | 6.8 | 7.4 | 7.1 | 8 | 9.5 | 9.9 |
Day / night temperatures
The graph below shows the daily range of temperatures for each month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min °C | 23 | 22.8 | 21.4 | 18.3 | 15.9 | 13.8 | 13.5 | 14.5 | 16.3 | 18.6 | 20.5 | 22.3 |
| Max °C | 33.6 | 33 | 31.5 | 27.9 | 24.9 | 22.6 | 23 | 24.7 | 26.5 | 29.1 | 31.2 | 33.2 |
| Min °F | 73.4 | 73 | 70.4 | 64.9 | 60.6 | 56.8 | 56.2 | 58.1 | 61.3 | 65.4 | 68.8 | 72.1 |
| Max °F | 82.9 | 82.2 | 79.5 | 73.6 | 68.7 | 64.8 | 64.8 | 67.3 | 70.5 | 74.8 | 78.4 | 81.9 |
Sea temperature
The graph below shows the average sea temperature.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 24 | 24.5 | 23.9 | 22.4 | 20.5 | 18.9 | 17.6 | 17.3 | 17.9 | 19 | 20.6 | 22.4 |
| °F | 75.3 | 76 | 75 | 72.4 | 69 | 65.9 | 63.7 | 63.1 | 64.1 | 66.3 | 69.1 | 72.3 |
Wind speed
The graph below shows the average wind speed.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| km/h | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 13 | 13 | 10 | 10 | 12 |
| mph | 6 | 5 | 6 | 5 | 6 | 6 | 6 | 8 | 8 | 6 | 6 | 8 |
A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.
Relative humidity
The graph below shows the average relative humidity.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 65% | 68% | 70% | 73% | 75% | 76% | 71% | 67% | 65% | 65% | 64% | 63% |
Other monthly averages
San Antonio weather stats
| Hottest month: | January | 33.3°C 91.9°F |
|---|---|---|
| Driest month: | July | 54mm 2.1ins |
| Sunniest month: | December | 9.9hrs |
| Coldest month: | June | 22.4°C 72.3°F |
| Wettest month: | November | 161mm 6.3ins |
| Warmest sea: | February | 24.5°C 76.1°F |
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