San Diego climate guide

Temperature in San Diego (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
19°C maximum daytime temperature in January in San Diego19
19°C maximum daytime temperature in February in San Diego19
19°C maximum daytime temperature in March in San Diego19
21°C maximum daytime temperature in April in San Diego21
21°C maximum daytime temperature in May in San Diego21
23°C maximum daytime temperature in June in San Diego23
26°C maximum daytime temperature in July in San Diego26
27°C maximum daytime temperature in August in San Diego27
26°C maximum daytime temperature in September in San Diego26
24°C maximum daytime temperature in October in San Diego24
22°C maximum daytime temperature in November in San Diego22
19°C maximum daytime temperature in December in San Diego19
Min temperature (night-time)
7°C minimum night-time temperature in January in San Diego7
8°C minimum night-time temperature in February in San Diego8
10°C minimum night-time temperature in March in San Diego10
11°C minimum night-time temperature in April in San Diego11
13°C minimum night-time temperature in May in San Diego13
15°C minimum night-time temperature in June in San Diego15
17°C minimum night-time temperature in July in San Diego17
18°C minimum night-time temperature in August in San Diego18
17°C minimum night-time temperature in September in San Diego17
14°C minimum night-time temperature in October in San Diego14
10°C minimum night-time temperature in November in San Diego10
8°C minimum night-time temperature in December in San Diego8
Sea temperature
15°C sea temperature in January in San Diego15
15°C sea temperature in February in San Diego15
15°C sea temperature in March in San Diego15
16°C sea temperature in April in San Diego16
17°C sea temperature in May in San Diego17
18°C sea temperature in June in San Diego18
20°C sea temperature in July in San Diego20
20°C sea temperature in August in San Diego20
20°C sea temperature in September in San Diego20
19°C sea temperature in October in San Diego19
17°C sea temperature in November in San Diego17
15°C sea temperature in December in San Diego15

Sunshine & Daylight in San Diego

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
10 hours of daylight per day in January in San Diego10
11 hours of daylight per day in February in San Diego11
12 hours of daylight per day in March in San Diego12
13 hours of daylight per day in April in San Diego13
14 hours of daylight per day in May in San Diego14
14 hours of daylight per day in June in San Diego14
14 hours of daylight per day in July in San Diego14
13 hours of daylight per day in August in San Diego13
12 hours of daylight per day in September in San Diego12
11 hours of daylight per day in October in San Diego11
10 hours of daylight per day in November in San Diego10
10 hours of daylight per day in December in San Diego10

Rainfall in San Diego

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
6 days with some rainfall in January in San Diego6
5 days with some rainfall in February in San Diego5
6 days with some rainfall in March in San Diego6
4 days with some rainfall in April in San Diego4
2 days with some rainfall in May in San Diego2
1 day with some rainfall in June in San Diego1
1 day with some rainfall in July in San Diego1
1 day with some rainfall in August in San Diego1
1 day with some rainfall in September in San Diego1
2 days with some rainfall in October in San Diego2
4 days with some rainfall in November in San Diego4
5 days with some rainfall in December in San Diego5
Average monthly rainfall (mm)
53 mm monthly rainfall in January in San Diego53
43 mm monthly rainfall in February in San Diego43
51 mm monthly rainfall in March in San Diego51
23 mm monthly rainfall in April in San Diego23
5 mm monthly rainfall in May in San Diego5
2 mm monthly rainfall in June in San Diego2
1 mm monthly rainfall in July in San Diego1
2 mm monthly rainfall in August in San Diego2
4 mm monthly rainfall in September in San Diego4
8 mm monthly rainfall in October in San Diego8
33 mm monthly rainfall in November in San Diego33
37 mm monthly rainfall in December in San Diego37

More climate for San Diego

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
UV (maximum) index 3 (Moderate) in January in San Diego3
UV (maximum) index 4 (Moderate) in February in San Diego4
UV (maximum) index 6 (High) in March in San Diego6
UV (maximum) index 8 (Very High) in April in San Diego8
UV (maximum) index 9 (Very High) in May in San Diego9
UV (maximum) index 10 (Very High) in June in San Diego10
UV (maximum) index 10 (Very High) in July in San Diego10
UV (maximum) index 10 (Very High) in August in San Diego10
UV (maximum) index 8 (Very High) in September in San Diego8
UV (maximum) index 6 (High) in October in San Diego6
UV (maximum) index 4 (Moderate) in November in San Diego4
UV (maximum) index 3 (Moderate) in December in San Diego3
Heat & Humidity
No heat & humidity in January in San Diego0
No heat & humidity in February in San Diego0
No heat & humidity in March in San Diego0
No heat & humidity in April in San Diego0
No heat & humidity in May in San Diego0
No heat & humidity in June in San Diego0
Low heat & humidity in July in San DiegoL
Moderate heat & humidity in August in San DiegoM
Low heat & humidity in September in San DiegoL
No heat & humidity in October in San Diego0
No heat & humidity in November in San Diego0
No heat & humidity in December in San Diego0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

What's the climate like in San Diego?

San Diego has a cool semi arid climate with warm dry summers.

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The climate guide for California (San Diego) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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