San Diego monthly weather averages
Average daytime temperature
The bar chart below shows the average monthly peak daytime temperatures at San Diego
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 29.5 | 30.2 | 30.9 | 30.5 | 29.7 | 28.4 | 28 | 28.4 | 28.8 | 29.4 | 29.3 | 29.2 |
| °F | 85.1 | 86.3 | 87.6 | 86.9 | 85.4 | 83.1 | 82.3 | 83.2 | 83.9 | 85 | 84.7 | 84.6 |
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 | 10 | 8 | 13 | 67 | 144 | 158 | 181 | 189 | 151 | 139 | 86 | 29 |
| inches | 0.4 | 0.3 | 0.5 | 2.6 | 5.7 | 6.2 | 7.1 | 7.4 | 5.9 | 5.5 | 3.4 | 1.1 |
| Rainy days | 3 | 2 | 2 | 7 | 13 | 18 | 18 | 20 | 16 | 15 | 12 | 6 |
Average annual rainfall in San Diego: 1115.633mm (439.2 inches)
Average daily sunshine
The bar chart below shows the average daily sunshine hours in San Diego
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hrs sunshine | 9.1 | 9.6 | 9.2 | 7.3 | 6.7 | 6.7 | 7.3 | 7.6 | 7.7 | 7.6 | 8.2 | 8.6 |
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 | 16 | 16.1 | 17.2 | 18.6 | 19.1 | 18.8 | 18.2 | 18.1 | 17.9 | 18.1 | 17.7 | 16.7 |
| Max °C | 29.9 | 30.5 | 31.2 | 30.8 | 30 | 28.6 | 28.2 | 28.7 | 29.1 | 29.7 | 29.6 | 29.6 |
| Min °F | 60.7 | 61 | 63 | 65.5 | 66.3 | 65.8 | 64.8 | 64.6 | 64.2 | 64.6 | 63.8 | 62 |
| Max °F | 73.2 | 73.9 | 75.6 | 76.5 | 76.1 | 74.7 | 73.8 | 74.1 | 74.3 | 75 | 74.5 | 73.6 |
Sea temperature
The graph below shows the average sea temperature.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 25.9 | 25.5 | 25.6 | 26 | 26.6 | 26.9 | 26.9 | 27.6 | 28.2 | 28.3 | 28 | 27 |
| °F | 78.7 | 77.9 | 78 | 78.7 | 79.9 | 80.5 | 80.5 | 81.6 | 82.7 | 82.9 | 82.5 | 80.6 |
Wind speed
The graph below shows the average wind speed.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| km/h | 8 | 8 | 9 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 |
| mph | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 72% | 68% | 67% | 71% | 77% | 80% | 82% | 83% | 82% | 82% | 80% | 76% |
Other monthly averages
San Diego weather stats
| Hottest month: | April | 30.5°C 86.9°F |
|---|---|---|
| Driest month: | February | 8mm 0.3ins |
| Sunniest month: | February | 9.6hrs |
| Coldest month: | January | 29.5°C 85.1°F |
| Wettest month: | August | 189mm 7.4ins |
| Warmest sea: | October | 28.3°C 82.9°F |
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