San Francisco, California Weather:
Tuesday, August 18, 2026
Cloudy Weather
Day 66°
Night 57°
Precipitation 25 %
Wind 4 mph
UV Index (0 - 11+) 3
Weather Forecast History
Last Year's Weather on This Day (August 18, 2025)
Cloudy Night

Day

70°

Night

57°

Wind

9 mph

Precipitation

0 %