Rialto, California Weather:
Friday, May 8, 2026
Cloudy Weather
Day 81°
Night 55°
Precipitation 1 %
Wind 5 mph
UV Index (0 - 11+) 11
Weather Forecast History
Last Year's Weather on This Day (May 8, 2025)
Sunny Weather

Day

88°

Night

61°

Wind

6 mph

UV Index

11

Precipitation

0 %