San Francisco monthly weather averages
Average daytime temperature
The bar chart below shows the average monthly peak daytime temperatures at San Francisco
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 22.9 | 23.4 | 24.6 | 25 | 25 | 24.5 | 23.9 | 24.2 | 24.1 | 24.1 | 23.5 | 23.2 |
| °F | 73.1 | 74.2 | 76.2 | 77.1 | 76.9 | 76 | 75.1 | 75.6 | 75.4 | 75.4 | 74.3 | 73.8 |
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 | 7 | 7 | 9 | 56 | 262 | 296 | 205 | 282 | 372 | 343 | 155 | 36 |
| inches | 0.3 | 0.3 | 0.4 | 2.2 | 10.3 | 11.7 | 8.1 | 11.1 | 14.6 | 13.5 | 6.1 | 1.4 |
| Rainy days | 12 | 9 | 8 | 10 | 19 | 24 | 23 | 24 | 24 | 23 | 18 | 16 |
Average annual rainfall in San Francisco: 1954.634mm (769.5 inches)
Average daily sunshine
The bar chart below shows the average daily sunshine hours in San Francisco
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hrs sunshine | 7.1 | 7.4 | 7.6 | 7.4 | 6.9 | 6.9 | 6.8 | 6.6 | 6.4 | 6.3 | 6.6 | 6.8 |
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 | 15 | 14.8 | 15.6 | 16.4 | 17.1 | 17.2 | 16.9 | 17 | 17.1 | 16.7 | 16.1 | 15.6 |
| Max °C | 23.1 | 23.7 | 24.8 | 25.3 | 25.2 | 24.7 | 24.1 | 24.4 | 24.3 | 24.3 | 23.7 | 23.4 |
| Min °F | 58.9 | 58.6 | 60.1 | 61.4 | 62.7 | 62.9 | 62.4 | 62.6 | 62.8 | 62.1 | 61 | 60.1 |
| Max °F | 66.2 | 66.6 | 68.4 | 69.4 | 70 | 69.6 | 68.9 | 69.3 | 69.3 | 68.9 | 67.8 | 67.1 |
Sea temperature
The graph below shows the average sea temperature.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 28.3 | 28.6 | 29.1 | 29.5 | 29.3 | 28.9 | 28.7 | 28.7 | 28.6 | 28.2 | 27.9 | 28 |
| °F | 83 | 83.5 | 84.3 | 85 | 84.7 | 84 | 83.7 | 83.7 | 83.5 | 82.8 | 82.1 | 82.5 |
Wind speed
The graph below shows the average wind speed.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| km/h | 24 | 23 | 21 | 19 | 13 | 12 | 14 | 13 | 10 | 11 | 14 | 20 |
| mph | 15 | 14 | 13 | 12 | 8 | 7 | 9 | 8 | 7 | 7 | 9 | 12 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 79% | 78% | 77% | 79% | 83% | 83% | 84% | 84% | 84% | 84% | 82% | 81% |
Other monthly averages
San Francisco weather stats
| Hottest month: | May | 25°C 77°F |
|---|---|---|
| Driest month: | January | 7mm 0.3ins |
| Sunniest month: | March | 7.6hrs |
| Coldest month: | January | 22.9°C 73.2°F |
| Wettest month: | September | 372mm 14.6ins |
| Warmest sea: | April | 29.5°C 85.1°F |
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