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Climate & Weather Averages in Cornwall, Ontario, Canada

Currently: 69 °F. Mild. (Weather station: St Anicet, Canada). See more current weather

Annual Weather Averages in St Anicet

St Anicet is 23 miles from Cornwall, so the actual climate in Cornwall can vary a bit.

Based on weather reports collected during 1992–2021.

All Year Climate & Weather Averages in Cornwall

High Temp: 80 °F

Low Temp: 7 °F

Mean Temp: 44 °F

Precipitation: 3.07"

Humidity: 74%

Dew Point: 36 °F

Wind: 12 mph

Pressure: 29.99 "Hg

Visibility: 9 mi

January Climate & Weather Averages in Cornwall

High Temp: 25 °F

Low Temp: 7 °F

Mean Temp: 16 °F

Precipitation: 2.72"

Humidity: 78%

Dew Point: 10 °F

Wind: 14 mph

Pressure: 30.03 "Hg

Visibility: 8 mi

February Climate & Weather Averages in Cornwall

High Temp: 27 °F

Low Temp: 8 °F

Mean Temp: 18 °F

Precipitation: 2.38"

Humidity: 74%

Dew Point: 11 °F

Wind: 14 mph

Pressure: 30.03 "Hg

Visibility: 8 mi

March Climate & Weather Averages in Cornwall

High Temp: 37 °F

Low Temp: 20 °F

Mean Temp: 28 °F

Precipitation: 2.51"

Humidity: 71%

Dew Point: 20 °F

Wind: 14 mph

Pressure: 30.03 "Hg

Visibility: 9 mi

April Climate & Weather Averages in Cornwall

High Temp: 52 °F

Low Temp: 33 °F

Mean Temp: 43 °F

Precipitation: 3.21"

Humidity: 65%

Dew Point: 31 °F

Wind: 14 mph

Pressure: 29.96 "Hg

Visibility: 9 mi

May Climate & Weather Averages in Cornwall

High Temp: 67 °F

Low Temp: 45 °F

Mean Temp: 56 °F

Precipitation: 2.98"

Humidity: 64%

Dew Point: 44 °F

Wind: 13 mph

Pressure: 29.96 "Hg

Visibility: 10 mi

June Climate & Weather Averages in Cornwall

High Temp: 76 °F

Low Temp: 55 °F

Mean Temp: 66 °F

Precipitation: 3.79"

Humidity: 71%

Dew Point: 56 °F

Wind: 11 mph

Pressure: 29.90 "Hg

Visibility: 9 mi

July Climate & Weather Averages in Cornwall

High Temp: 80 °F

Low Temp: 59 °F

Mean Temp: 70 °F

Precipitation: 3.39"

Humidity: 76%

Dew Point: 61 °F

Wind: 9 mph

Pressure: 29.91 "Hg

Visibility: 9 mi

August Climate & Weather Averages in Cornwall

High Temp: 79 °F

Low Temp: 57 °F

Mean Temp: 68 °F

Precipitation: 3.05"

Humidity: 78%

Dew Point: 60 °F

Wind: 8 mph

Pressure: 29.96 "Hg

Visibility: 9 mi

September Climate & Weather Averages in Cornwall

High Temp: 71 °F

Low Temp: 49 °F

Mean Temp: 60 °F

Precipitation: 3.54"

Humidity: 79%

Dew Point: 53 °F

Wind: 9 mph

Pressure: 30.02 "Hg

Visibility: 9 mi

October Climate & Weather Averages in Cornwall

High Temp: 57 °F

Low Temp: 38 °F

Mean Temp: 48 °F

Precipitation: 3.63"

Humidity: 78%

Dew Point: 41 °F

Wind: 11 mph

Pressure: 30.01 "Hg

Visibility: 9 mi

November Climate & Weather Averages in Cornwall

High Temp: 44 °F

Low Temp: 28 °F

Mean Temp: 36 °F

Precipitation: 2.80"

Humidity: 78%

Dew Point: 30 °F

Wind: 12 mph

Pressure: 30.04 "Hg

Visibility: 9 mi

December Climate & Weather Averages in Cornwall

High Temp: 32 °F

Low Temp: 17 °F

Mean Temp: 25 °F

Precipitation: 2.86"

Humidity: 81%

Dew Point: 19 °F

Wind: 14 mph

Pressure: 30.03 "Hg

Visibility: 8 mi

Quick Climate Info

Hottest MonthJuly (70 °F avg)
Coldest MonthJanuary (16 °F avg)
Wettest MonthJune (3.79" avg)
Windiest MonthFebruary (14 mph avg)
Annual precip.36.87" (per year)

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