San Francisco rainfall for 2021
San Francisco picked up 21.83 inches of rain in 2021. Measurable rain, 0.01 inch or more in a day, fell on 55 days at San Francisco International Airport; the wettest day brought 4.02 inches on Oct 24, 2021. The 1991-2020 normal for a full year is 19.64 inches. The total landed 2.19 inches above the normal, which works out to 11% more. 2021 ranks 25th out of 80 complete years, wettest first, in a record that starts in 1945.
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San Francisco rainfall for 2021
| Year total | 21.83 inches | 2021 |
|---|---|---|
| 1991-2020 normal | 19.64 inches | Averages are 1991-2020 normals from NCEI. |
| Departure vs normal | +2.19 inches (+11%) | 111% of normal |
| Year rank | 25th of 80 | Complete years from 1945, wettest first |
| Rain days | 55 | |
| Wettest day | 4.02 inches |
Rain by month in 2021
Every day with measurable rain in 2021
Daily totals come from San Francisco International Airport, which appears in GHCN-Daily with records going back to 1945. Station observations are from GHCN-Daily, with a 1-3 day lag and quality checks by NOAA.
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