Rialto, California Weather:
Sunday, September 27, 2026
Sunny Weather
Day 88°
Night 61°
Precipitation 20 %
Wind 1 mph
UV Index (0 - 11+) 6
Weather Forecast History
Last Year's Weather on This Day (September 27, 2025)
Cloudy Night

Day

77°

Night

63°

Wind

6 mph

Precipitation

22 %