Cloudy skies · California
How cloudy is San Diego?
In a typical year, the sky over San Diego is mostly cloudy or overcast about 40% of the time, and clear or nearly clear about 43%.
May is the cloudiest month, mostly cloudy about 49% of the time, and August the least cloudy, at about 29%. Across winter, December to February, it’s mostly cloudy about 40% of the time. That makes it the 50th least cloudy sky of the 116 US cities we track.
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The forecast for the next 48 hours has the sky mostly cloudy about 31% of the time.
San Diego’s cloudiest month is May, at about 49% mostly cloudy, which is the one time a year the city’s weather looks a bit off-script.
Live 48-hour forecast from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
The sky at a glance
| Mostly cloudy or overcast, all year | 40% |
|---|---|
| Clear or nearly clear, all year | 43% |
| Mostly cloudy, December to February | 40% |
| Cloudiest month | May, 49% |
| Least cloudy month | August, 29% |
Shares of hours across a typical year. Mostly cloudy means at least five eighths of the sky covered; clear or nearly clear means two eighths or less.
Cities with about the same sky
- Green Bay, Wisconsin: mostly cloudy about 40% of the time
- Portland, Maine: mostly cloudy about 40% of the time
- Concord, New Hampshire: mostly cloudy about 41% of the time
More about the weather here
Source: NOAA U.S. Climate Normals, hourly, 1991 to 2020, station USW00023188. Airport sensors see cloud up to about 12,000 feet, so thin high cloud isn’t counted.