San Diego, California, United States climate

Average temperatures, precipitation and all-time records for San Diego, California, United States, with every day graded against ~46 years of local climate history (1980–2026). Its warmest month is August, averaging a high of 74°F, and its coldest is January, with an average low of 52°F.

San Diego is a city on the Pacific coast of Southern California, adjacent to the Mexico–United States border. It is the eighth-most populous city in the U.S. via Wikipedia

San Diego average temperatures by month

Typical daily high and low, and average precipitation, for each month in San Diego, California, United States, based on 1980–2026 records. The wettest month is January (0.10 in on an average day).

Month	Avg high	Avg low	Avg precip
January	63°F	52°F	0.10 in
February	62°F	53°F	0.10 in
March	63°F	54°F	0.10 in
April	65°F	56°F	0.00 in
May	66°F	58°F	0.00 in
June	69°F	60°F	0.00 in
July	73°F	65°F	0.00 in
August	74°F	66°F	0.00 in
September	74°F	65°F	0.00 in
October	71°F	62°F	0.00 in
November	67°F	57°F	0.00 in
December	63°F	53°F	0.10 in

Jan 48°–68°

Feb 49°–69°

Mar 51°–69°

Apr 53°–72°

May 56°–71°

Jun 58°–73°

Jul 62°–77°

Aug 62°–79°

Sep 62°–80°

Oct 59°–78°

Nov 53°–73°

Dec 49°–68°

Each bar spans the 10th-percentile daily low to the 90th-percentile daily high (the range most days fall within), coloured cold → hot on a shared -10°F to 115°F scale, so the whole year's rhythm reads at a glance.

Thinking of visiting San Diego?

Trips live and die by the weather. See how San Diego's comfort stacks up against where you live. San Diego is pre-loaded, just add your city.

Compare San Diego's comfort with your city →

Record extremes

Hottest day on record: 96°F on 1988-09-04
Coldest day on record: 39°F on 1990-12-23

All San Diego weather records →

Percentiles compare each day to San Diego, California, United States's own history, so grades are relative to this location: a “Near Record” day here isn't the same temperature as elsewhere. How the grades work →