Rialto, California Weather:
Tuesday, September 22, 2026
Sunny Weather
Day 84°
Night 63°
Precipitation 2 %
Wind 5 mph
UV Index (0 - 11+) 6
Weather Forecast History
Last Year's Weather on This Day (September 22, 2025)
Cloudy Night

Day

90°

Night

68°

Wind

4 mph

Precipitation

1 %