San Francisco Monthly Climate
Don't forget to check WhereWeather Website for weather statistics on your exact travel dates, for any city in the world. You can also compare different cities and dates side-by-side.
Temperature Overview
- Average Daytime Temperature: 17°C (63°F)
- Average Nighttime Temperature: 11°C (52°F)
Rainfall Statistics
- Annual average daily rainfall: 1.6 mm (0.06 inches) per day
- Rainiest month: January with around 4.2 mm (0.17 inches) per day
- Driest month: July with around 0.1 mm (0.004 inches) per day
- Average number of rainy days per year: 68 days
Monthly Weather Conditions
Temperature
Precipitation
Seasonal Breakdown
January-March
- Highs: 14-17°C (57-63°F)
- Lows: 8-9°C (46-48°F)
- Rainy Days: 9-11 days per month
- Average Precipitation: 3.6 mm/day
April-June
- Highs: 18-20°C (64-68°F)
- Lows: 10-13°C (50-55°F)
- Rainy Days: 1-6 days per month
- Average Precipitation: 0.7 mm/day
July-September
- Highs: 20-21°C (68-70°F)
- Lows: 13-14°C (55-57°F)
- Rainy Days: 1 day per month
- Average Precipitation: 0.1 mm/day
October-December
- Highs: 15-21°C (59-70°F)
- Lows: 8-12°C (46-54°F)
- Rainy Days: 4-11 days per month
- Average Precipitation: 2.6 mm/day
Best Time to Visit
The best time to visit San Francisco is from September to November, when the city experiences its warmest temperatures and least fog. This "Indian Summer" period offers clear skies and perfect conditions for sightseeing.
Spring (March-May) brings mild temperatures and decreasing rainfall, ideal for exploring the city's outdoor attractions and enjoying the blooming gardens in Golden Gate Park.
Summer (June-August) is characterized by fog and cool temperatures, especially in the morning and evening. Pack layers, as temperatures can vary significantly throughout the day.
Winter (December-February) is mild with occasional rain, perfect for visiting museums, enjoying the city's exceptional dining scene, and experiencing the vibrant cultural events that occur throughout the winter season.
Other Cities in the United States
Want to explore more of the United States? Check out our weather guides for other American cities:
New York
Northeast metropolis with four distinct seasons
Miami
Tropical paradise with warm weather year-round
Chicago
Windy city with continental climate
Los Angeles
Southern California with endless summer
Las Vegas
Desert city with hot, dry climate
Orlando
Theme park capital with subtropical weather
Boston
Historic city with New England seasons
San Diego
Perfect weather year-round
Washington DC
Capital city with four seasons
Before you go ahead and plan your next visit, make sure to check the weather forecast for your exact travel dates on WhereWeather Website. You can also compare different cities and dates side-by-side.