San Antonio: Annual Weather Averages
July is the hottest month in San Antonio with an average temperature of 77°F (25°C) and the coldest is January at 52°F (11°C) with the most daily sunshine hours at 10 in July. The wettest month is October with an average of 66mm of rain. The best month to swim in the sea is in August when the average sea temperature is 79°F (26°C).
Average Temperature: San Antonio
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 11 | 11 | 13 | 15 | 18 | 22 | 25 | 25 | 23 | 20 | 15 | 12 |
| °F | 52 | 52 | 55 | 59 | 64 | 72 | 77 | 77 | 73 | 68 | 59 | 54 |
Average High/Low Temperature: San Antonio
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °C | 14 | 14 | 16 | 18 | 21 | 26 | 28 | 28 | 26 | 23 | 18 | 15 |
| High °F | 57 | 57 | 61 | 64 | 70 | 79 | 82 | 82 | 79 | 73 | 64 | 59 |
| Low °C | 7 | 7 | 9 | 11 | 14 | 18 | 21 | 22 | 19 | 16 | 12 | 9 |
| Low °F | 45 | 45 | 48 | 52 | 57 | 64 | 70 | 72 | 66 | 61 | 54 | 48 |
Average Rainfall: San Antonio
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | 34 | 28 | 39 | 37 | 24 | 14 | 6 | 26 | 42 | 66 | 50 | 56 |
| Days | 10 | 7 | 7 | 7 | 7 | 4 | 3 | 4 | 8 | 10 | 10 | 11 |
Average Daily Sunshine Hours: San Antonio
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hours | 4 | 5 | 6 | 7 | 7 | 9 | 10 | 9 | 7 | 6 | 4 | 4 |
Average Sea Temperature: San Antonio
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 15 | 14 | 15 | 16 | 18 | 21 | 24 | 26 | 24 | 22 | 19 | 16 |
| °F | 59 | 57 | 59 | 61 | 64 | 70 | 75 | 79 | 75 | 72 | 66 | 61 |