Ontario Airport (ONT) Weather 04/30/2025
Tonight
54
Mostly Clear
Wednesday
77
Patchy Fog then Mostly Sunny
Wednesday Night
54
Partly Cloudy
Thursday
75
Patchy Fog then Mostly Sunny
Thursday Night
53
Partly Cloudy
Friday
74
Mostly Sunny
Friday Night
55
Partly Cloudy
Saturday
69
Partly Sunny
Saturday Night
50
Slight Chance Showers
Sunday
61
Slight Chance Showers
Sunday Night
50
Mostly Cloudy
Monday
64
Partly Sunny
Monday Night
50
Partly Cloudy
Weekly Forecast
Tonight
Mostly clear, with a low around 54. West wind around 5 mph.
Wednesday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 77. Light west wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Wednesday Night
Partly cloudy, with a low around 54. West wind 10 to 15 mph becoming light southwest after midnight. Winds could gust as high as 20 mph.
Thursday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 75. Light southwest wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Thursday Night
Partly cloudy, with a low around 53. West wind 10 to 15 mph becoming light after midnight. Winds could gust as high as 20 mph.
Friday
Mostly sunny, with a high near 74.
Friday Night
Partly cloudy, with a low around 55.
Saturday
Partly sunny, with a high near 69.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 50.
Sunday
A slight chance of showers. Cloudy, with a high near 61.
Sunday Night
Mostly cloudy, with a low around 50.
Monday
Partly sunny, with a high near 64.
Monday Night
Partly cloudy, with a low around 50.