Saturday
Patchy fog
High:
82°F
Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 82. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Ontario, CA Weather - Extended Forecast
Saturday Night
Patchy fog
Overnight low:
57°F
Patchy fog after 8pm. Otherwise, partly cloudy, with a low around 57. Southwest wind 10 to 15 mph becoming light after midnight. Winds could gust as high as 20 mph.
Sunday
Patchy fog
High:
80°F
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 80.
Sunday Night
Clear
Overnight low:
57°F
Clear, with a low around 57.
Monday
Sunny
High:
82°F
Monday Night
Mostly clear
Overnight low:
57°F
Tuesday
Sunny
High:
83°F
Tuesday Night
Mostly clear
Overnight low:
59°F
Wednesday
Sunny
High:
83°F
Wednesday Night
Mostly clear
Overnight low:
59°F
Thursday
Sunny
High:
84°F