Annual mean 26°C · wettest around October · prevailing wind E
Warmest
32.7 °C
Coldest
29.3 °C
Wettest
88%
Windiest
3.5 m/s
Prevailing
E
2.4 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in San Francisco over the whole year is 26°C. April is the hottest month, with highs of about 32°C; January is the coldest, with lows of about 20°C. The rainy (wet) season in San Francisco runs from April to November, peaking in October with a 69% chance of rain on a given day. The dry season is December to March; February is the driest month, at 15%. Winds in San Francisco are highest in February, averaging 2.8 m/s (10 km/h), and lightest in September, at 1.3 m/s (5 km/h). The prevailing wind is from the E. The clearest skies in San Francisco come in January, when the sky is typically 34% covered; June is the cloudiest month, at 56%.
Month by month San Francisco climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
30°C
20°C
30°C
25%
34%
2.7 m/s
23
35
16
February
31°C
21°C
31°C
15%
34%
2.8 m/s
22
35
14
March
32°C
22°C
32°C
25%
35%
2.4 m/s
19
26
10
April
32°C
23°C
34°C
46%
41%
2.2 m/s
16
22
7
May
31°C
24°C
35°C
58%
50%
1.6 m/s
14
20
6
June
30°C
22°C
34°C
67%
56%
1.4 m/s
16
21
7
July
31°C
22°C
34°C
55%
48%
1.8 m/s
17
17
9
August
31°C
23°C
34°C
62%
51%
1.6 m/s
16
18
8
September
30°C
22°C
34°C
66%
53%
1.3 m/s
15
20
6
October
30°C
22°C
33°C
69%
52%
1.4 m/s
18
21
10
November
30°C
21°C
32°C
44%
46%
1.8 m/s
22
22
14
December
30°C
21°C
31°C
24%
37%
2.5 m/s
23
29
16
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short San Francisco weather by season
Year round, San Francisco has days of about 30°C at their warmest in October, its coolest month, and 32°C in April, its warmest; the coolest hours of the day run from 20°C to 24°C through the year, and the average temperature over the year is 26°C around the clock. Rain is most likely around October and least likely around February. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
San Francisco weather in winterDecember to February
High 30°CLow 21°CRain 21%
Winter in San Francisco has typical daily highs of about 30°C and lows of about 21°C, with a 21% chance of rain on a given day.
San Francisco weather in springMarch to May
High 32°CLow 23°CRain 43%
Spring in San Francisco has typical daily highs of about 32°C and lows of about 23°C, with a 43% chance of rain on a given day.
San Francisco weather in summerJune to August
High 31°CLow 22°CRain 61%
Summer in San Francisco has typical daily highs of about 31°C and lows of about 22°C, with a 61% chance of rain on a given day.
San Francisco weather in autumnSeptember to November
High 30°CLow 22°CRain 60%
Autumn in San Francisco has typical daily highs of about 30°C and lows of about 22°C, with a 60% chance of rain on a given day.
When is the rainy season in San Francisco?
The rainy (wet) season in San Francisco runs from April to November, peaking in October with a 69% chance of rain on a given day. The dry season is December to March; February is the driest month, at 15%.
What time of year is San Francisco windiest?
Winds in San Francisco are highest in February, averaging 2.8 m/s (10 km/h), and lightest in September, at 1.3 m/s (5 km/h). The prevailing wind is from the E.
What is the average temperature in San Francisco year round?
The average temperature in San Francisco over the whole year is 26°C. April is the hottest month, with highs of about 32°C; January is the coldest, with lows of about 20°C.