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> Usa > San Diego, California > Precipitation
Rainfall/ Precipitation in San Diego, California, Usa
- San Diego, California receives 251.5 mm (9.9 in) of rainfall per year, or 21 mm (0.8 in) per month.
- On average there are 44 days per year with more than 0.1 mm (0.004 in) of rainfall (precipitation) or 3.7 days with a quantity of rain, sleet, snow etc. per month.
- The driest weather is in July when an average of 0.5 mm (0 in) of rainfall (precipitation) occurs.
- The wettest weather is in January when an average of 45.7 mm (1.8 in) of rainfall (precipitation) occurs.
Precipitation Table
| Climate Variable | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Average Precipitation mm (in) | 45.7 (1.8) | 38.9 (1.5) | 45 (1.8) | 20.1 (0.8) | 4.8 (0.2) | 1.8 (0.1) | 0.5 (0) | 2.5 (0.1) | 6.1 (0.2) | 9.4 (0.4) | 36.8 (1.4) | 39.9 (1.6) | 251.5 (9.9) | |
 | Precipitation Litres/m² (Gallons/ft²) | 45.7 (1.12) | 38.9 (0.95) | 45 (1.1) | 20.1 (0.49) | 4.8 (0.12) | 1.8 (0.04) | 0.5 (0.01) | 2.5 (0.06) | 6.1 (0.15) | 9.4 (0.23) | 36.8 (0.9) | 39.9 (0.98) | 251.5 (6.17) | |
 | Number of Wet Days (probability of rain on a day) | 7 (23%) | 7 (25%) | 7 (23%) | 5 (17%) | 2 (6%) | 1 (3%) | 0.5 (2%) | 1 (3%) | 1 (3%) | 3 (10%) | 4 (13%) | 6 (19%) | 44.5 (12%) | |
 | Percentage of Sunny (Cloudy) Daylight Hours | 68 (32) | 65 (35) | 70 (30) | 60 (40) | 58 (42) | 58 (42) | 69 (31) | 68 (32) | 71 (29) | 69 (31) | 72 (28) | 77 (23) | 68 (32) |