San Francisco climate guide

Temperature in San Francisco (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
13°C maximum daytime temperature in January in San Francisco13
16°C maximum daytime temperature in February in San Francisco16
16°C maximum daytime temperature in March in San Francisco16
17°C maximum daytime temperature in April in San Francisco17
18°C maximum daytime temperature in May in San Francisco18
19°C maximum daytime temperature in June in San Francisco19
20°C maximum daytime temperature in July in San Francisco20
20°C maximum daytime temperature in August in San Francisco20
22°C maximum daytime temperature in September in San Francisco22
21°C maximum daytime temperature in October in San Francisco21
17°C maximum daytime temperature in November in San Francisco17
14°C maximum daytime temperature in December in San Francisco14
Min temperature (night-time)
7°C minimum night-time temperature in January in San Francisco7
8°C minimum night-time temperature in February in San Francisco8
8°C minimum night-time temperature in March in San Francisco8
9°C minimum night-time temperature in April in San Francisco9
10°C minimum night-time temperature in May in San Francisco10
11°C minimum night-time temperature in June in San Francisco11
12°C minimum night-time temperature in July in San Francisco12
13°C minimum night-time temperature in August in San Francisco13
13°C minimum night-time temperature in September in San Francisco13
12°C minimum night-time temperature in October in San Francisco12
10°C minimum night-time temperature in November in San Francisco10
7°C minimum night-time temperature in December in San Francisco7
Sea temperature
11°C sea temperature in January in San Francisco11
11°C sea temperature in February in San Francisco11
12°C sea temperature in March in San Francisco12
12°C sea temperature in April in San Francisco12
11°C sea temperature in May in San Francisco11
12°C sea temperature in June in San Francisco12
13°C sea temperature in July in San Francisco13
14°C sea temperature in August in San Francisco14
14°C sea temperature in September in San Francisco14
14°C sea temperature in October in San Francisco14
13°C sea temperature in November in San Francisco13
12°C sea temperature in December in San Francisco12

Sunshine & Daylight in San Francisco

  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 Francisco10
11 hours of daylight per day in February in San Francisco11
12 hours of daylight per day in March in San Francisco12
13 hours of daylight per day in April in San Francisco13
14 hours of daylight per day in May in San Francisco14
15 hours of daylight per day in June in San Francisco15
14 hours of daylight per day in July in San Francisco14
14 hours of daylight per day in August in San Francisco14
12 hours of daylight per day in September in San Francisco12
11 hours of daylight per day in October in San Francisco11
10 hours of daylight per day in November in San Francisco10
10 hours of daylight per day in December in San Francisco10

Rainfall in San Francisco

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
10 days with some rainfall in January in San Francisco10
9 days with some rainfall in February in San Francisco9
11 days with some rainfall in March in San Francisco11
6 days with some rainfall in April in San Francisco6
3 days with some rainfall in May in San Francisco3
1 day with some rainfall in June in San Francisco1
1 day with some rainfall in July in San Francisco1
1 day with some rainfall in August in San Francisco1
2 days with some rainfall in September in San Francisco2
4 days with some rainfall in October in San Francisco4
8 days with some rainfall in November in San Francisco8
10 days with some rainfall in December in San Francisco10
Average monthly rainfall (mm)
125 mm monthly rainfall in January in San Francisco125
91 mm monthly rainfall in February in San Francisco91
89 mm monthly rainfall in March in San Francisco89
40 mm monthly rainfall in April in San Francisco40
7 mm monthly rainfall in May in San Francisco7
4 mm monthly rainfall in June in San Francisco4
1 mm monthly rainfall in July in San Francisco1
2 mm monthly rainfall in August in San Francisco2
7 mm monthly rainfall in September in San Francisco7
35 mm monthly rainfall in October in San Francisco35
90 mm monthly rainfall in November in San Francisco90
97 mm monthly rainfall in December in San Francisco97

More climate for San Francisco

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
UV (maximum) index 2 (Low) in January in San Francisco2
UV (maximum) index 3 (Moderate) in February in San Francisco3
UV (maximum) index 5 (Moderate) in March in San Francisco5
UV (maximum) index 7 (High) in April in San Francisco7
UV (maximum) index 8 (Very High) in May in San Francisco8
UV (maximum) index 9 (Very High) in June in San Francisco9
UV (maximum) index 9 (Very High) in July in San Francisco9
UV (maximum) index 9 (Very High) in August in San Francisco9
UV (maximum) index 7 (High) in September in San Francisco7
UV (maximum) index 5 (Moderate) in October in San Francisco5
UV (maximum) index 3 (Moderate) in November in San Francisco3
UV (maximum) index 2 (Low) in December in San Francisco2
Heat & Humidity
No heat & humidity in January in San Francisco0
No heat & humidity in February in San Francisco0
No heat & humidity in March in San Francisco0
No heat & humidity in April in San Francisco0
No heat & humidity in May in San Francisco0
No heat & humidity in June in San Francisco0
No heat & humidity in July in San Francisco0
No heat & humidity in August in San Francisco0
No heat & humidity in September in San Francisco0
No heat & humidity in October in San Francisco0
No heat & humidity in November in San Francisco0
No heat & humidity in December in San Francisco0

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

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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The climate guide for San Francisco, California 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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