Ontario, CA Weather - Tomorrow’s Forecast

Saturday

Heavy rain

High:
63°F

Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 63. East wind 5 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

Saturday Night

Showers

Overnight low:
50°F

Showers and possibly a thunderstorm. Low around 50. Southwest wind 5 to 10 mph becoming southeast after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.