Sunday
Sunny
High:
78°F
Sunny, with a high near 78. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Ontario, CA Weather - Extended Forecast
Sunday Night
Mostly clear
Overnight low:
54°F
Mostly clear, with a low around 54. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Monday
Sunny
High:
77°F
Sunny, with a high near 77.
Monday Night
Mostly clear
Overnight low:
53°F
Mostly clear, with a low around 53.
Tuesday
Patchy fog
High:
75°F
Tuesday Night
Partly cloudy
Overnight low:
53°F
Wednesday
Patchy fog
High:
72°F
Wednesday Night
Patchy fog
Overnight low:
50°F
Thursday
Patchy fog
High:
70°F
Thursday Night
Partly cloudy
Overnight low:
51°F
Friday
Patchy fog
High:
68°F