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Climate & Weather Averages in Ontario, Oregon, USA

Currently: 47 °F. Partly sunny. (Weather station: Ontario Municipal Airport, USA). See more current weather

Annual 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

Quick Climate Info

Hottest MonthJuly (78 °F avg)
Coldest MonthDecember (30 °F avg)
Wettest MonthDecember (1.46" avg)
Windiest MonthApril (11 mph avg)
Annual precip.9.80" (per year)

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