Rialto, California Weather:
Sunday, August 30, 2026
Sunny Weather
Day 99°
Night 66°
Precipitation 2 %
Wind 9 mph
UV Index (0 - 11+) 9
Weather Forecast History
Last Year's Weather on This Day (August 30, 2025)
Night

Day

97°

Night

70°

Wind

4 mph

Precipitation

0 %