Thursday
Mostly sunny
High:
67°F
Mostly sunny, with a high near 67. Calm wind becoming west around 5 mph in the afternoon.
Ontario, CA Weather - Extended Forecast
Thursday Night
Mostly cloudy
Overnight low:
46°F
Mostly cloudy, with a low around 46. West wind around 5 mph becoming calm in the evening.
Friday
Mostly sunny
High:
69°F
Mostly sunny, with a high near 69.
Friday Night
Mostly clear
Overnight low:
46°F
Mostly clear, with a low around 46.
Saturday
Sunny
High:
70°F
Saturday Night
Mostly clear
Overnight low:
46°F
Sunday
Mostly sunny
High:
65°F
Sunday Night
Partly cloudy
Overnight low:
43°F
Monday
Mostly sunny
High:
64°F
Monday Night
Mostly clear
Overnight low:
43°F
Tuesday
Sunny
High:
66°F