Weather in San Francisco

• All Year
• Spring
• Summer
• Autumn
• Winter

Yearly weather

Calculations are based on the last 8 years of historical weather data.

Temperatures

• San Francisco enjoys mild temperatures year-round, with all months falling within a comfortable range

• The warmest months are August and September, with average highs around 22.3°C

• The coolest months are December, January and February, with average lows around 8.0°C-8.7°C, still well above discomfort levels

• There are no discomfort temperatures in San Francisco.

Conditions

• San Francisco experiences a distinct seasonal variation in sun hours and precipitation levels, with the driest and sunniest months occurring from May to September.

• Notably, June has the highest sun hours at 11.5h and minimal precipitation (only 0.05mm), while December records the lowest sun hours (2.5h) and the highest precipitation (6.34mm), indicating a significant shift in weather patterns from summer to winter.

Astronomy

• In San Francisco, the earliest sunrise occurs in June at 5:48 AM, while the latest sunrise is recorded in January at 7:22 AM.

• Conversely, the city's latest sunset happens also in June at 8:32 PM, and the earliest sunset is in December at 4:53 PM, which highlights the significant seasonal variation in daylight hours.

• The shortest day of the year is in December, with just 9 hours and 35 minutes of daylight, whereas the longest day in June boasts a duration of 14 hours and 43 minutes, indicating a wide range in day length correlating with the changing seasons.