Thursday
Patchy fog
High:
71°F
Patchy fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 71. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Ontario, CA Weather - Extended Forecast
Thursday Night
Clouds increasing
Overnight low:
54°F
Increasing clouds, with a low around 54.
Friday
Clouds clearing
High:
68°F
Cloudy, then gradually becoming mostly sunny, with a high near 68.
Friday Night
Mostly cloudy
Overnight low:
53°F
Mostly cloudy, with a low around 53.
Saturday
Partly sunny
High:
68°F
Saturday Night
Mostly cloudy
Overnight low:
53°F
Sunday
Clouds clearing
High:
72°F
Sunday Night
Patchy fog
Overnight low:
53°F
Memorial Day
Patchy fog
High:
77°F