Ontario Airport (ONT) Weather 11/04/2025
This Afternoon
79
Sunny
Tonight
53
Mostly Clear then Patchy Fog
Wednesday
73
Patchy Fog then Sunny
Wednesday Night
53
Mostly Clear
Thursday
74
Sunny
Thursday Night
54
Clear
Friday
82
Sunny
Friday Night
57
Clear
Saturday
83
Sunny
Saturday Night
58
Mostly Clear
Sunday
85
Sunny
Sunday Night
59
Partly Cloudy
Monday
81
Mostly Sunny
Weekly Forecast
This Afternoon
Sunny, with a high near 79. West wind around 5 mph.
Tonight
Patchy fog after 1am. Otherwise, increasing clouds, with a low around 53. West wind around 5 mph becoming calm after midnight.
Wednesday
Patchy fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 73. Light west wind increasing to 5 to 10 mph in the morning.
Wednesday Night
Mostly clear, with a low around 53. West wind 5 to 10 mph becoming light southwest after midnight.
Thursday
Sunny, with a high near 74. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Thursday Night
Clear, with a low around 54.
Friday
Sunny, with a high near 82.
Friday Night
Clear, with a low around 57.
Saturday
Sunny, with a high near 83.
Saturday Night
Mostly clear, with a low around 58.
Sunday
Sunny, with a high near 85.
Sunday Night
Partly cloudy, with a low around 59.
Monday
Mostly sunny, with a high near 81.