Currently: 57 °F. Partly sunny. (Weather station: Ontario International Airport, USA). See more current weatherAnnual Weather Averages in Ontario
Based on weather reports collected during 1985–2015.
All Year Climate & Weather Averages in Ontario
High Temp: 94 °F
Low Temp: 41 °F
Mean Temp: 65 °F
Precipitation: 0.09"
Humidity: 61%
Dew Point: 48 °F
Wind: 6 mph
Pressure: 29.97 "Hg
Visibility: 9 mi
January Climate & Weather Averages in Ontario
High Temp: 68 °F
Low Temp: 42 °F
Mean Temp: 55 °F
Precipitation: 0.17"
Humidity: 60%
Dew Point: 38 °F
Wind: 5 mph
Pressure: 30.09 "Hg
Visibility: 11 mi
February Climate & Weather Averages in Ontario
High Temp: 68 °F
Low Temp: 44 °F
Mean Temp: 56 °F
Precipitation: 0.58"
Humidity: 65%
Dew Point: 42 °F
Wind: 5 mph
Pressure: 30.05 "Hg
Visibility: 10 mi
March Climate & Weather Averages in Ontario
High Temp: 71 °F
Low Temp: 47 °F
Mean Temp: 59 °F
Precipitation: 0.10"
Humidity: 65%
Dew Point: 45 °F
Wind: 6 mph
Pressure: 30.01 "Hg
Visibility: 9 mi
April Climate & Weather Averages in Ontario
High Temp: 76 °F
Low Temp: 50 °F
Mean Temp: 63 °F
Precipitation: 0.04"
Humidity: 62%
Dew Point: 46 °F
Wind: 6 mph
Pressure: 29.97 "Hg
Visibility: 9 mi
May Climate & Weather Averages in Ontario
High Temp: 80 °F
Low Temp: 54 °F
Mean Temp: 67 °F
Precipitation: 0.01"
Humidity: 64%
Dew Point: 52 °F
Wind: 7 mph
Pressure: 29.93 "Hg
Visibility: 8 mi
June Climate & Weather Averages in Ontario
High Temp: 86 °F
Low Temp: 58 °F
Mean Temp: 72 °F
Precipitation: 0.00"
Humidity: 63%
Dew Point: 55 °F
Wind: 7 mph
Pressure: 29.89 "Hg
Visibility: 7 mi
July Climate & Weather Averages in Ontario
High Temp: 92 °F
Low Temp: 62 °F
Mean Temp: 77 °F
Precipitation: 0.00"
Humidity: 60%
Dew Point: 59 °F
Wind: 7 mph
Pressure: 29.90 "Hg
Visibility: 8 mi
August Climate & Weather Averages in Ontario
High Temp: 94 °F
Low Temp: 63 °F
Mean Temp: 78 °F
Precipitation: 0.00"
Humidity: 56%
Dew Point: 58 °F
Wind: 6 mph
Pressure: 29.89 "Hg
Visibility: 8 mi
September Climate & Weather Averages in Ontario
High Temp: 91 °F
Low Temp: 60 °F
Mean Temp: 76 °F
Precipitation: 0.00"
Humidity: 57%
Dew Point: 56 °F
Wind: 5 mph
Pressure: 29.88 "Hg
Visibility: 8 mi
October Climate & Weather Averages in Ontario
High Temp: 82 °F
Low Temp: 54 °F
Mean Temp: 68 °F
Precipitation: 0.01"
Humidity: 60%
Dew Point: 50 °F
Wind: 5 mph
Pressure: 29.95 "Hg
Visibility: 8 mi
November Climate & Weather Averages in Ontario
High Temp: 74 °F
Low Temp: 46 °F
Mean Temp: 60 °F
Precipitation: 0.05"
Humidity: 57%
Dew Point: 41 °F
Wind: 5 mph
Pressure: 30.03 "Hg
Visibility: 10 mi
December Climate & Weather Averages in Ontario
High Temp: 67 °F
Low Temp: 41 °F
Mean Temp: 54 °F
Precipitation: 0.14"
Humidity: 59%
Dew Point: 37 °F
Wind: 4 mph
Pressure: 30.08 "Hg
Visibility: 11 mi