Riverside, California Weather:
Monday, September 21, 2026
Sunny Weather
Day 93°
Night 64°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 6
Weather Forecast History
Last Year's Weather on This Day (September 21, 2025)
Cloudy Night

Day

81°

Night

64°

Wind

4 mph

Precipitation

2 %