Ontario Airport (ONT) Weather 10/15/2025
Today
77
Patchy Fog then Sunny
Tonight
56
Mostly Clear
Saturday
80
Sunny
Saturday Night
57
Clear
Sunday
80
Sunny
Sunday Night
58
Mostly Clear
Monday
79
Sunny
Monday Night
57
Mostly Clear
Tuesday
80
Sunny
Tuesday Night
58
Mostly Clear
Wednesday
83
Sunny
Wednesday Night
61
Mostly Clear
Thursday
83
Patchy Fog then Mostly Sunny
Weekly Forecast
Today
Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 77. Northeast wind 5 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph.
Tonight
Mostly clear, with a low around 56. Southwest wind 5 to 15 mph becoming east after midnight. Winds could gust as high as 20 mph.
Saturday
Sunny, with a high near 80. Light southwest wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Clear, with a low around 57. West wind 5 to 10 mph becoming light southwest in the evening. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 80. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Mostly clear, with a low around 58.
Monday
Sunny, with a high near 79.
Monday Night
Mostly clear, with a low around 57.
Tuesday
Sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 58.
Wednesday
Sunny, with a high near 83.
Wednesday Night
Mostly clear, with a low around 61.
Thursday
Patchy fog. Otherwise, mostly sunny, with a high near 83.