San Ramón monthly weather averages
Average daytime temperature
The bar chart below shows the average monthly peak daytime temperatures at San Ramón
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 28.9 | 27.8 | 25.6 | 22.1 | 18.6 | 15.6 | 15.1 | 16.4 | 18.3 | 20.8 | 24 | 27 |
| °F | 84 | 82.1 | 78.1 | 71.7 | 65.5 | 60 | 59.2 | 61.5 | 64.9 | 69.4 | 75.1 | 80.6 |
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 | 96 | 110 | 110 | 96 | 96 | 97 | 97 | 96 | 102 | 110 | 90 | 85 |
| inches | 3.8 | 4.3 | 4.3 | 3.8 | 3.8 | 3.8 | 3.8 | 3.8 | 4 | 4.3 | 3.5 | 3.4 |
| Rainy days | 11 | 11 | 10 | 9 | 9 | 9 | 10 | 9 | 9 | 10 | 11 | 10 |
Average annual rainfall in San Ramón: 1094.833mm (431 inches)
Average daily sunshine
The bar chart below shows the average daily sunshine hours in San Ramón
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hrs sunshine | 9.8 | 8.3 | 7.9 | 6.6 | 5.8 | 4.8 | 5 | 5.7 | 6.6 | 8 | 8.5 | 9.7 |
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 | 18.7 | 18.4 | 16.4 | 12.9 | 10 | 7.7 | 7.1 | 7.8 | 9.3 | 11.6 | 14.4 | 17 |
| Max °C | 29.2 | 28.1 | 25.9 | 22.3 | 18.9 | 15.8 | 15.3 | 16.6 | 18.5 | 21 | 24.2 | 27.3 |
| Min °F | 65.6 | 65 | 61.4 | 55.2 | 49.9 | 45.8 | 44.8 | 46 | 48.7 | 52.9 | 57.9 | 62.5 |
| Max °F | 75 | 73.8 | 70 | 63.7 | 57.9 | 53.1 | 52.2 | 54 | 57 | 61.3 | 66.7 | 71.8 |
Sea temperature
The graph below shows the average sea temperature.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 22.6 | 23 | 22.2 | 19.6 | 16.5 | 13.7 | 11.7 | 11.5 | 12.4 | 15 | 17.7 | 20.5 |
| °F | 72.7 | 73.4 | 72 | 67.3 | 61.7 | 56.6 | 53.1 | 52.7 | 54.4 | 59 | 63.9 | 68.8 |
Wind speed
The graph below shows the average wind speed.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| km/h | 17 | 17 | 16 | 15 | 14 | 16 | 16 | 16 | 18 | 18 | 18 | 18 |
| mph | 11 | 10 | 10 | 9 | 9 | 10 | 10 | 10 | 11 | 11 | 11 | 11 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 68% | 71% | 73% | 76% | 78% | 82% | 81% | 77% | 76% | 74% | 71% | 68% |
Other monthly averages
San Ramón weather stats
| Hottest month: | January | 28.9°C 84°F |
|---|---|---|
| Driest month: | December | 85mm 3.3ins |
| Sunniest month: | January | 9.8hrs |
| Coldest month: | July | 15.1°C 59.2°F |
| Wettest month: | October | 110mm 4.3ins |
| Warmest sea: | February | 23°C 73.4°F |
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