Climate normals · 1970–2000
San Diego Climate
San Diego is a city in United States (CA) with a population of about 1,404,452. Its average annual temperature is 18.1°C (65°F), with roughly 280 mm of rain per year.
18.1°C
Avg Temp
280
Precip (mm/yr)
Aug
Hottest Month
Jan
Coldest Month
San Diego Climate
San Diego has an average annual temperature of 18.1°C (65°F) and receives about 280 mm of precipitation per year. The warmest month is August and the coldest is January. Figures are 1970–2000 climate normals.
18.1°C
Avg Temp
280
Precip (mm/yr)
Aug
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 14° / 58° | 56 mm |
| February | 15° / 59° | 53 mm |
| March | 15° / 60° | 58 mm |
| April | 17° / 62° | 21 mm |
| May | 18° / 65° | 5 mm |
| June | 20° / 68° | 2 mm |
| July | 22° / 71° | 1 mm |
| August | 23° / 73° | 2 mm |
| September | 22° / 72° | 5 mm |
| October | 20° / 68° | 11 mm |
| November | 17° / 62° | 31 mm |
| December | 14° / 58° | 35 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit San Diego
The most comfortable months to visit San Diego are typically July, June and October, when temperatures are mildest and rainfall is relatively low. The hottest month is August (around 27°C high). The coldest is January (near 9°C low). March is usually the wettest month.
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Frequently Asked Questions
The most comfortable months to visit San Diego are typically July, June and October, when temperatures are mildest and rainfall is relatively low (1970–2000 climate normals).
San Diego, United States has an average annual temperature of 18.1°C and about 280 mm of precipitation per year. The warmest month is August and the coldest is January.
In August, the hottest month, daily highs in San Diego average about 27°C (81°F).
Monthly climate normals (1970–2000) sampled from WorldClim 2.1 at ~9 km resolution. Humidity derived from vapor pressure. City coordinates and population from GeoNames.