San Diego, CA Climate

Summary Graph

The summary climate graph for San Diego, CA shows a selection of temperature, rainfall and snow minimum, mean and maximum measures over the course of a year. Click on each of the measures in the key to toggle them on and off.

Graph of average and extreme temperature ranges by day for San Diego, CA.


The warmest month in North Island Naval Air Station, San Diego, California is August with an average high temperature of 75.8°F. The hottest day on record was September 26 1963 when the temperature hit 108.3°F. During January the overnight temperature drops to an average of 49.1°F with the lowest temperature of 31.1°F being recorded on February 8 2001.

Warmest Days

Warmest Months

Coldest Days

Coldest Months

The warmest days on record are:

26 Sep 1963108.3°F
5 Sep 1988108°F
14 Oct 1961106.3°F
15 Sep 2012105.1°F
4 Oct 1987104°F

The warmest months on average were:

September 198483.7°F
September 201282.6°F
October 200882.2°F
September 197981.9°F
September 196380.8°F

The coldest days on record are:

8 Feb 200131.1°F
13 Jan 196332.4°F
19 Dec 200633.3°F
13 Jan 200533.4°F
23 Jan 200133.6°F

The coldest months on average were:

January 194941.7°F
January 195044.5°F
January 200144.8°F
January 194744.9°F
December 199945°F


The wettest month by average rainfall in San Diego, CA is January with an average of 1.7 inches of rain falling on 7 to 8 days.Although in March it typically rains on more days with 1.4 inches falling in 7 to 8 days. The driest month by average rainfall in San Diego, CA is July with an average of 0.0 inches of rain falling on 2 to 3 days. Although in August it typically rains on less days with 0.1 inches falling in 1 to 2 days

Wettest Days

The wettest days on record are:

26 March 19972 inches
18 March 19822 inches
1 March 19781.8 inches
1 March 19911.7 inches
7 March 19521.7 inches

Wettest Months

The wettest months on record are:

February 19987.9 inches
January 20056.4 inches
January 19806.1 inches
January 19786.1 inches
March 19836 inches

Driest Months

The driest months on record are:

July 19460 inches
June 19460 inches
July 19450 inches
October 19450 inches
August 19460 inches
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