Fairfield, California Weather:
Sunday, September 20, 2026
Sunny Weather
Day 86°
Night 57°
Precipitation 1 %
Wind 12 mph
UV Index (0 - 11+) 5
Weather Forecast History
Last Year's Weather on This Day (September 20, 2025)
Night

Day

84°

Night

61°

Wind

10 mph

Precipitation

1 %