San Francisco, USA: Annual Weather Averages
July is the hottest month in San Francisco with an average temperature of 14°C (57°F) and the coldest is January at 10°C (50°F) with the most daily sunshine hours at 14 in July. The wettest month is January with an average of 119mm of rain. The best month to swim in the sea is in August when the average sea temperature is 15°C (59°F).
Average Temperature: San Francisco
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 10 | 11 | 11 | 11 | 13 | 13 | 14 | 14 | 14 | 14 | 13 | 10 |
| °F | 50 | 52 | 52 | 52 | 55 | 55 | 57 | 57 | 57 | 57 | 55 | 50 |
Average High/Low Temperature: San Francisco
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °C | 13 | 15 | 16 | 17 | 17 | 19 | 23 | 22 | 21 | 20 | 17 | 13 |
| Low °C | 7 | 8 | 9 | 10 | 10 | 11 | 15 | 14 | 13 | 12 | 10 | 8 |
| High °F | 55 | 59 | 61 | 63 | 63 | 66 | 73 | 72 | 70 | 68 | 63 | 55 |
| Low °F | 45 | 46 | 48 | 50 | 50 | 52 | 59 | 57 | 55 | 54 | 50 | 46 |
Average Day/Night Temperature: San Francisco
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Day °C | 12 | 13 | 15 | 16 | 17 | 18 | 19 | 19 | 20 | 19 | 15 | 12 |
| Night °C | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 16 | 17 | 15 | 13 | 10 |
| Day °F | 54 | 56 | 59 | 61 | 62 | 65 | 65 | 67 | 69 | 66 | 60 | 54 |
| Night °F | 50 | 52 | 54 | 56 | 56 | 59 | 60 | 61 | 62 | 60 | 55 | 50 |
Average Rainfall: San Francisco
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | 119 | 97 | 79 | 38 | 18 | 3 | 0 | 0 | 8 | 25 | 64 | 112 |
| Days | 11 | 11 | 10 | 6 | 4 | 2 | 0 | 0 | 2 | 4 | 7 | 10 |
Average Daily Sunshine Hours: San Francisco
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hours | 7 | 7 | 9 | 10 | 11 | 12 | 14 | 12 | 11 | 9 | 8 | 6 |
Average Sea Temperature: San Francisco
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 13 | 12 | 12 | 12 | 12 | 13 | 14 | 15 | 15 | 15 | 14 | 13 |
| °F | 55 | 54 | 54 | 54 | 54 | 55 | 57 | 59 | 59 | 59 | 57 | 55 |