Ontario Airport (ONT) Weather 09/24/2025
Overnight
68
Slight Chance T-storms
Friday
87
Chance Showers then Sunny
Friday Night
66
Mostly Clear
Saturday
89
Sunny
Saturday Night
66
Mostly Clear
Sunday
88
Slight Chance Showers
Sunday Night
67
Partly Cloudy
Monday
91
Slight Chance Showers then Mostly Sunny
Monday Night
69
Partly Cloudy
Tuesday
91
Mostly Sunny
Tuesday Night
68
Mostly Clear
Wednesday
91
Sunny
Wednesday Night
65
Mostly Clear
Weekly Forecast
Overnight
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 68. West wind around 5 mph. Chance of precipitation is 10%.
Friday
A chance of showers and thunderstorms before 11am. Mostly sunny, with a high near 87. Light southwest wind increasing to 5 to 10 mph in the afternoon. Chance of precipitation is 30%.
Friday Night
Mostly clear, with a low around 66. West wind 5 to 10 mph.
Saturday
Sunny, with a high near 89. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 66. West wind around 5 mph becoming calm after midnight.
Sunday
A slight chance of showers. Mostly sunny, with a high near 88. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 67.
Monday
A slight chance of showers before 11am. Mostly sunny, with a high near 91.
Monday Night
Partly cloudy, with a low around 69.
Tuesday
Mostly sunny, with a high near 91.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Sunny, with a high near 91.
Wednesday Night
Mostly clear, with a low around 65.