Ontario Airport (ONT) Weather 11/25/2025
This Afternoon
60
Chance Showers
Tonight
44
Partly Cloudy then Patchy Fog
Wednesday
63
Patchy Fog then Sunny
Wednesday Night
46
Increasing Clouds
Thursday
58
Slight Chance Showers then Showers Likely
Thursday Night
48
Heavy Rain
Friday
60
Chance Showers
Friday Night
48
Chance Showers
Saturday
68
Slight Chance Showers then Mostly Sunny
Saturday Night
48
Mostly Clear
Sunday
70
Sunny
Sunday Night
49
Mostly Clear
Monday
69
Sunny
Weekly Forecast
This Afternoon
A chance of showers. Mostly sunny, with a high near 60. Southwest wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 44. Calm wind becoming north around 5 mph.
Wednesday
Patchy fog before 7am. Otherwise, sunny, with a high near 63. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
Increasing clouds, with a low around 46. West wind around 5 mph becoming southeast after midnight.
Thursday
Showers likely, mainly after 4pm. Partly sunny, with a high near 58. East wind around 5 mph becoming south in the afternoon. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Showers. The rain could be heavy at times. Low around 48. Chance of precipitation is 80%.
Friday
A chance of showers. Partly sunny, with a high near 60. Chance of precipitation is 50%.
Friday Night
A chance of showers, mainly before 4am. Mostly cloudy, with a low around 48.
Saturday
A slight chance of showers before 10am. Mostly sunny, with a high near 68.
Saturday Night
Mostly clear, with a low around 48.
Sunday
Sunny, with a high near 70.
Sunday Night
Mostly clear, with a low around 49.
Monday
Sunny, with a high near 69.