Ontario, CA Weather - Tomorrow’s Forecast

Wednesday

Sunny

High:
92°F

Sunny, with a high near 92. Light west wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

Wednesday Night

Clear

Overnight low:
69°F

Clear, with a low around 69. Southwest wind 5 to 10 mph becoming light west after midnight.