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 83°F, and its coldest is December, with an average low of 45°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

How today compares

Latest recorded day: 2026-10-12. Each reading placed on San Diego, California, United States's own ±7-day seasonal distribution.

High 71°F Low · 18th pct

Low 61°F High · 80th pct

Feels-like 60°F Below Normal · 28th pct*

Humidity 11.1 g/m³ Normal · 43rd pct

Wind 12 mph Very High · 98th pct

Gust* 16 mph Very Low · 6th pct*

Precip 0.16 in Very Heavy · 91st pct

Percentiles marked * are pending verification.

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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	65°F	45°F	0.10 in
February	65°F	46°F	0.10 in
March	67°F	48°F	0.10 in
April	70°F	51°F	0.00 in
May	72°F	55°F	0.00 in
June	77°F	59°F	0.00 in
July	82°F	64°F	0.00 in
August	83°F	65°F	0.00 in
September	81°F	63°F	0.00 in
October	77°F	57°F	0.00 in
November	71°F	50°F	0.10 in
December	65°F	45°F	0.10 in

Jan 38°–75°

Feb 39°–76°

Mar 43°–77°

Apr 46°–80°

May 51°–81°

Jun 55°–84°

Jul 60°–87°

Aug 60°–89°

Sep 58°–90°

Oct 52°–87°

Nov 43°–81°

Dec 38°–73°

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.

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Record extremes

Hottest day on record: 104°F on 2016-06-20
Coldest day on record: 27°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 →