Currently: 42 °F. Clear. (Weather station: Ontario Municipal Airport, USA). See more current weatherAnnual Weather Averages in Ontario
Based on weather reports collected during 1992–2021.
All Year Climate & Weather Averages in Ontario
High Temp: 94 °F
Low Temp: 23 °F
Mean Temp: 52 °F
Precipitation: 0.82"
Humidity: 55%
Dew Point: 35 °F
Wind: 8 mph
Pressure: 30.05 "Hg
Visibility: 9 mi
January Climate & Weather Averages in Ontario
High Temp: 37 °F
Low Temp: 24 °F
Mean Temp: 31 °F
Precipitation: 1.26"
Humidity: 80%
Dew Point: 25 °F
Wind: 6 mph
Pressure: 30.26 "Hg
Visibility: 7 mi
February Climate & Weather Averages in Ontario
High Temp: 45 °F
Low Temp: 26 °F
Mean Temp: 36 °F
Precipitation: 0.92"
Humidity: 70%
Dew Point: 27 °F
Wind: 8 mph
Pressure: 30.15 "Hg
Visibility: 9 mi
March Climate & Weather Averages in Ontario
High Temp: 57 °F
Low Temp: 32 °F
Mean Temp: 45 °F
Precipitation: 0.96"
Humidity: 58%
Dew Point: 30 °F
Wind: 9 mph
Pressure: 30.07 "Hg
Visibility: 10 mi
April Climate & Weather Averages in Ontario
High Temp: 65 °F
Low Temp: 37 °F
Mean Temp: 51 °F
Precipitation: 0.80"
Humidity: 50%
Dew Point: 32 °F
Wind: 11 mph
Pressure: 30.00 "Hg
Visibility: 10 mi
May Climate & Weather Averages in Ontario
High Temp: 75 °F
Low Temp: 47 °F
Mean Temp: 61 °F
Precipitation: 1.19"
Humidity: 47%
Dew Point: 39 °F
Wind: 10 mph
Pressure: 29.94 "Hg
Visibility: 10 mi
June Climate & Weather Averages in Ontario
High Temp: 84 °F
Low Temp: 54 °F
Mean Temp: 69 °F
Precipitation: 0.69"
Humidity: 42%
Dew Point: 43 °F
Wind: 9 mph
Pressure: 29.91 "Hg
Visibility: 10 mi
July Climate & Weather Averages in Ontario
High Temp: 94 °F
Low Temp: 61 °F
Mean Temp: 78 °F
Precipitation: 0.40"
Humidity: 35%
Dew Point: 46 °F
Wind: 8 mph
Pressure: 29.90 "Hg
Visibility: 10 mi
August Climate & Weather Averages in Ontario
High Temp: 92 °F
Low Temp: 57 °F
Mean Temp: 75 °F
Precipitation: 0.17"
Humidity: 37%
Dew Point: 45 °F
Wind: 7 mph
Pressure: 29.90 "Hg
Visibility: 10 mi
September Climate & Weather Averages in Ontario
High Temp: 82 °F
Low Temp: 47 °F
Mean Temp: 64 °F
Precipitation: 0.31"
Humidity: 43%
Dew Point: 40 °F
Wind: 6 mph
Pressure: 29.97 "Hg
Visibility: 10 mi
October Climate & Weather Averages in Ontario
High Temp: 65 °F
Low Temp: 37 °F
Mean Temp: 51 °F
Precipitation: 0.70"
Humidity: 54%
Dew Point: 34 °F
Wind: 7 mph
Pressure: 30.09 "Hg
Visibility: 10 mi
November Climate & Weather Averages in Ontario
High Temp: 49 °F
Low Temp: 28 °F
Mean Temp: 39 °F
Precipitation: 0.93"
Humidity: 69%
Dew Point: 29 °F
Wind: 6 mph
Pressure: 30.19 "Hg
Visibility: 9 mi
December Climate & Weather Averages in Ontario
High Temp: 37 °F
Low Temp: 23 °F
Mean Temp: 30 °F
Precipitation: 1.46"
Humidity: 78%
Dew Point: 24 °F
Wind: 7 mph
Pressure: 30.24 "Hg
Visibility: 8 mi