Annual Weather Averages Near Cornwall
Averages are for Cardinham, which is 7 miles from Cornwall.
Based on weather reports collected during 2012–2021.
All Year Climate & Weather Averages in Cornwall
High Temp: 68 °F
Low Temp: 37 °F
Mean Temp: 50 °F
Precipitation: 4.79"
Humidity: 87%
Dew Point: 47 °F
Wind: 21 mph
Pressure: 29.98 "Hg
Visibility: 11 mi
January Climate & Weather Averages in Cornwall
High Temp: 47 °F
Low Temp: 38 °F
Mean Temp: 43 °F
Precipitation: 6.26"
Humidity: 90%
Dew Point: 40 °F
Wind: 25 mph
Pressure: 29.96 "Hg
Visibility: 10 mi
February Climate & Weather Averages in Cornwall
High Temp: 47 °F
Low Temp: 37 °F
Mean Temp: 42 °F
Precipitation: 5.26"
Humidity: 88%
Dew Point: 38 °F
Wind: 26 mph
Pressure: 29.97 "Hg
Visibility: 10 mi
March Climate & Weather Averages in Cornwall
High Temp: 50 °F
Low Temp: 38 °F
Mean Temp: 44 °F
Precipitation: 4.05"
Humidity: 86%
Dew Point: 40 °F
Wind: 23 mph
Pressure: 30.00 "Hg
Visibility: 10 mi
April Climate & Weather Averages in Cornwall
High Temp: 54 °F
Low Temp: 41 °F
Mean Temp: 47 °F
Precipitation: 2.75"
Humidity: 81%
Dew Point: 41 °F
Wind: 20 mph
Pressure: 29.98 "Hg
Visibility: 13 mi
May Climate & Weather Averages in Cornwall
High Temp: 59 °F
Low Temp: 45 °F
Mean Temp: 52 °F
Precipitation: 3.01"
Humidity: 83%
Dew Point: 47 °F
Wind: 20 mph
Pressure: 30.00 "Hg
Visibility: 12 mi
June Climate & Weather Averages in Cornwall
High Temp: 63 °F
Low Temp: 51 °F
Mean Temp: 57 °F
Precipitation: 3.69"
Humidity: 86%
Dew Point: 52 °F
Wind: 19 mph
Pressure: 30.01 "Hg
Visibility: 12 mi
July Climate & Weather Averages in Cornwall
High Temp: 68 °F
Low Temp: 54 °F
Mean Temp: 61 °F
Precipitation: 3.48"
Humidity: 85%
Dew Point: 56 °F
Wind: 17 mph
Pressure: 30.02 "Hg
Visibility: 13 mi
August Climate & Weather Averages in Cornwall
High Temp: 66 °F
Low Temp: 53 °F
Mean Temp: 60 °F
Precipitation: 5.20"
Humidity: 88%
Dew Point: 56 °F
Wind: 18 mph
Pressure: 30.00 "Hg
Visibility: 12 mi
September Climate & Weather Averages in Cornwall
High Temp: 63 °F
Low Temp: 51 °F
Mean Temp: 57 °F
Precipitation: 3.91"
Humidity: 88%
Dew Point: 53 °F
Wind: 18 mph
Pressure: 30.05 "Hg
Visibility: 11 mi
October Climate & Weather Averages in Cornwall
High Temp: 57 °F
Low Temp: 47 °F
Mean Temp: 52 °F
Precipitation: 6.33"
Humidity: 90%
Dew Point: 49 °F
Wind: 21 mph
Pressure: 29.95 "Hg
Visibility: 11 mi
November Climate & Weather Averages in Cornwall
High Temp: 51 °F
Low Temp: 42 °F
Mean Temp: 47 °F
Precipitation: 6.44"
Humidity: 90%
Dew Point: 44 °F
Wind: 22 mph
Pressure: 29.92 "Hg
Visibility: 12 mi
December Climate & Weather Averages in Cornwall
High Temp: 49 °F
Low Temp: 41 °F
Mean Temp: 45 °F
Precipitation: 7.15"
Humidity: 91%
Dew Point: 43 °F
Wind: 25 mph
Pressure: 29.95 "Hg
Visibility: 10 mi