Saturday
Mostly sunny
High:
91°F
Mostly sunny, with a high near 91.
Ontario, CA Weather - Extended Forecast
Saturday Night
Mostly cloudy
Overnight low:
65°F
Mostly cloudy, with a low around 65.
Sunday
Partly sunny
High:
92°F
Partly sunny, with a high near 92.
Sunday Night
Chance of showers and thunderstorms
Overnight low:
66°F
A slight chance of showers after 11pm. Partly cloudy, with a low around 66.
Monday
Chance of showers and thunderstorms
High:
93°F
Monday Night
Mostly clear
Overnight low:
67°F
Tuesday
Sunny
High:
97°F
Tuesday Night
Mostly clear
Overnight low:
70°F
Wednesday
Sunny
High:
100°F