San Francisco, California Weather:
Monday, September 21, 2026
Cloudy Weather
Day 66°
Night 61°
Precipitation 0 %
Wind 12 mph
UV Index (0 - 11+) 5
Weather Forecast History
Last Year's Weather on This Day (September 21, 2025)
Night

Day

68°

Night

57°

Wind

8 mph

Precipitation

0 %