San Diego County · California
San Diego, CA weather averages
NOAA climate normals for 1991-2020, measured at San Diego Intl Ap, 2.8 km from the city centre — month by month temperature, rain and snow.
Quick answer
San Diego averages a daily high of 69.7°F and a daily low of 57.5°F across the year, with 10.34 inches of precipitation. August is the warmest month at 76.4°F and December the coldest at 48.4°F.
- Average annual high
- 69.7°FWarmest month August
- Average annual low
- 57.5°FColdest month December
- Precipitation per year
- 10.34 inWettest month February
- Snowfall per year
- 0 in0 days at or below 32°F
San Diego weather month by month
Normal daily high and low, precipitation and snowfall for each month, 1991-2020.
| Month | High °F | Low °F | Precip in | Snow in | Range |
|---|---|---|---|---|---|
| January | 65.1 | 49 | 1.98 | 0 | 49 to 65.1 degrees |
| February | 65 | 50.7 | 2.27 | 0 | 50.7 to 65 degrees |
| March | 65.6 | 53.2 | 1.81 | 0 | 53.2 to 65.6 degrees |
| April | 67.5 | 55.9 | 0.78 | 0 | 55.9 to 67.5 degrees |
| May | 68.5 | 59.4 | 0.12 | 0 | 59.4 to 68.5 degrees |
| June | 70.8 | 62 | 0.07 | 0 | 62 to 70.8 degrees |
| July | 74.6 | 65.4 | 0.03 | 0 | 65.4 to 74.6 degrees |
| August | 76.4 | 66.7 | 0.02 | 0 | 66.7 to 76.4 degrees |
| September | 75.9 | 65.2 | 0.15 | 0 | 65.2 to 75.9 degrees |
| October | 72.8 | 60.6 | 0.57 | 0 | 60.6 to 72.8 degrees |
| November | 69 | 53.6 | 1.01 | 0 | 53.6 to 69 degrees |
| December | 64.7 | 48.4 | 1.53 | 0 | 48.4 to 64.7 degrees |
Source: NOAA NCEI, U.S. Climate Normals 1991-2020 — station USW00023188, San Diego Intl Ap · rates as published for 1991-2020 normals
How to read San Diego climate normals
What a climate normal is, and what it is not.
A normal is the average of thirty years of daily observations at one station — here San Diego Intl Ap, 2.8 km from the centre of San Diego. It describes a typical year, so any single year will run warmer, cooler, wetter or drier. Readings taken at an airport on the edge of town usually sit a degree or two below a dense downtown on summer nights. San Diego sees about 1.2 days a year at or above 90°F and about 21.7 days with a tenth of an inch of precipitation or more.
Keep going
Other San Diego data on this site.