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Cornwall Weather in 2020

Historical record of Cornwall, Ontario weather for the year 2020 based on NOAA data.
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Year:
2020 Cornwall Weather Extremes
Highest temperature 37.5 °C July 10
Lowest temperature -25.0 °C February 9
Highest daily low 23.0 °C July 19
Lowest daily high -15.0 °C January 17
Most daily precipitation 3.9 cm July 11
Most daily snow 22.0 cm January 18
Total annual precipitation 82.5 cm -
Total annual snow 124.0 cm -
What was the hottest temperature in Cornwall in 2020?
The highest temperature recorded in Cornwall, Ontario in 2020 was 37.5 °C which happened on July 10.
Highest Temperatures: All-Time By Year
Highest Temperatures in Cornwall in 2020
Rank Temperature Date
1 37.5 °C Jul 10
2 36.0 °C Jul 9
3 35.0 °C Jul 7
3 35.0 °C Jun 22
3 35.0 °C May 27
6 34.0 °C Jul 8
6 34.0 °C Jun 23
6 34.0 °C Jun 21
9 33.0 °C Jul 19
9 33.0 °C Jun 20
9 33.0 °C Jun 18
9 33.0 °C May 26
What was the coldest temperature in Cornwall in 2020?
The lowest temperature recorded in Cornwall, Ontario in 2020 was -25.0 °C which happened on Feb 9.
Lowest Temperatures: All-Time By Year
Lowest Temperatures in Cornwall in 2020
Rank Temperature Date
1 -25.0 °C February 9
2 -24.0 °C February 14
3 -20.0 °C January 17
4 -19.0 °C February 15
5 -18.0 °C December 16
5 -18.0 °C February 8
5 -18.0 °C January 20
5 -18.0 °C January 18
9 -17.0 °C February 21
9 -17.0 °C January 21
9 -17.0 °C January 9
January 2020 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
January 1
 1.5 -0.5 0.10 1.0
January 2
 6.5 -1.5 0.00 0.0
January 3
 6.5 4.0 0.00 0.0
January 4
 2.5 0.5 0.00 0.0
January 5
 -5.0 -6.0 0.10 1.0
January 6
 0.0 -10.0 0.60 6.0
January 7
 1.0 -5.0 0.20 2.0
January 8
 0.0 -3.0 0.00 0.0
January 9
 -4.0 -17.0 0.00 0.0
January 10
 9.0 -11.0 0.40 0.0
January 11
 13.0 4.0 3.20 3.0
January 12
 -3.0 -7.0 0.20 2.0
January 13
 -5.5 -10.0 0.00 0.0
January 14
 -0.5 -7.0 0.00 0.0
January 15
 2.0 -6.0 0.80 8.0
January 16
 -1.5 -2.5 0.10 1.0
January 17
 -15.0 -20.0 0.00 0.0
January 18
 -12.5 -18.0 2.20 22.0
January 19
 -9.0 -14.0 0.20 2.0
January 20
 -9.5 -18.0 0.00 0.0
January 21
 -3.5 -17.0 0.00 0.0
January 22
 1.5 -7.0 0.00 0.0
January 23
 4.0 -2.0 0.00 0.0
January 24
 2.0 -5.5 0.00 0.0
January 25
 2.0 -4.0 0.10 1.0
January 26
 2.5 0.0 1.10 0.0
January 27
 2.0 0.0 0.00 0.0
January 28
 -1.0 -2.0 0.00 0.0
January 29
 -6.5 -10.5 0.00 0.0
January 30
 -4.5 -16.5 0.00 0.0
January 31
 0.0 -15.0 0.20 2.0
February 2020 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
February 1
 0.0 -10.0 0.00 0.0
February 2
 0.0 -6.0 0.00 0.0
February 3
 4.0 -4.0 0.00 0.0
February 4
 2.0 -4.0 0.00 0.0
February 5
 -7.0 -8.0 0.20 2.0
February 6
 -6.0 -10.0 1.20 12.0
February 7
 -6.0 -8.5 0.80 8.0
February 8
 -14.0 -18.0 0.00 0.0
February 9
 -3.0 -25.0 0.70 7.0
February 10
 1.0 -9.0 0.30 3.0
February 11
 0.0 -10.0 0.00 0.0
February 12
 2.5 -2.0 0.20 2.0
February 13
 1.0 -6.5 0.30 3.0
February 14
 -12.0 -24.0 0.00 0.0
February 15
 -1.0 -19.0 0.00 0.0
February 16
 4.0 -5.0 0.00 0.0
February 17
 -5.0 -10.0 0.00 0.0
February 18
 7.0 -15.0 0.00 0.0
February 19
 -1.0 -6.0 0.00 0.0
February 20
 -10.0 -14.0 0.00 0.0
February 21
 -1.0 -17.0 0.00 0.0
February 22
 4.0 1.0 0.00 0.0
February 23
 8.0 -4.0 0.00 0.0
February 24
 9.0 1.0 0.00 0.0
February 25
 4.5 -1.0 0.00 0.0
February 26
 3.0 -2.0 0.20 2.0
February 27
 0.5 -4.0 0.80 n/a
February 28
 -3.5 -9.0 0.10 1.0
February 29
 -8.0 -15.0 0.00 0.0
March 2020 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
March 1
 -2.5 -13.0 0.10 1.0
March 2
 7.5 -7.5 0.00 0.0
March 3
 7.0 0.0 0.00 0.0
March 4
 5.0 1.5 1.32 0.0
March 5
 3.0 -1.0 0.20 2.0
March 6
 1.0 -2.0 0.00 0.0
March 7
 0.0 -9.5 0.00 0.0
March 8
 10.0 -2.0 0.00 0.0
March 9
 16.0 5.0 0.40 n/a
March 10
 12.0 8.0 0.60 0.0
March 11
 0.0 -5.0 0.00 0.0
March 12
 8.0 -2.0 0.00 0.0
March 13
 11.0 0.0 1.00 0.0
March 14
 6.0 2.0 0.00 0.0
March 15
 -1.0 -7.0 0.00 0.0
March 16
 5.0 -9.0 0.00 0.0
March 17
 6.0 -2.0 0.32 0.0
March 18
 6.0 -4.0 0.00 0.0
March 19
 13.0 1.5 0.52 0.0
March 20
 18.0 3.0 0.70 0.0
March 21
 -2.0 -8.0 0.00 0.0
March 22
 1.0 -10.0 0.00 0.0
March 23
 2.5 -5.0 0.50 5.0
March 24
 6.5 -1.0 0.00 0.0
March 25
 10.5 -4.0 0.00 0.0
March 26
 16.5 1.0 0.00 0.0
March 27
 10.0 0.0 0.00 0.0
March 28
 9.5 -4.5 0.00 0.0
March 29
 10.0 3.5 2.44 0.0
March 30
 10.0 3.0 0.90 0.0
March 31
 9.0 1.0 0.00 0.0
April 2020 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
April 1
 7.0 -2.0 0.00 0.0
April 2
 10.0 1.0 0.30 0.0
April 3
 9.0 3.0 0.20 0.0
April 4
 13.0 2.0 0.00 0.0
April 5
 10.0 7.0 0.00 0.0
April 6
 13.5 -1.0 0.00 0.0
April 7
 14.0 0.0 0.00 0.0
April 8
 9.0 0.0 0.00 0.0
April 9
 6.0 2.0 0.80 0.0
April 10
 6.5 1.0 0.24 0.0
April 11
 7.0 -1.0 0.00 0.0
April 12
 15.0 0.0 0.70 0.0
April 13
 18.0 8.5 0.96 0.0
April 14
 9.0 2.5 0.00 0.0
April 15
 6.0 -0.5 0.00 0.0
April 16
 6.0 -3.0 0.00 0.0
April 17
 7.0 -1.0 0.00 0.0
April 18
 10.5 -3.0 0.00 0.0
April 19
 12.0 3.5 0.42 0.0
April 20
 7.0 -4.0 0.00 0.0
April 21
 10.0 -2.0 0.20 0.0
April 22
 4.0 -6.0 0.00 0.0
April 23
 9.0 -3.0 0.00 0.0
April 24
 10.0 -2.0 0.00 0.0
April 25
 15.0 -1.0 0.00 0.0
April 26
 13.0 5.0 0.00 0.0
April 27
 11.0 5.0 0.00 0.0
April 28
 13.5 1.0 0.00 0.0
April 29
 19.0 1.0 0.00 0.0
April 30
 15.0 11.0 0.30 0.0
May 2020 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
May 1
 16.0 10.0 0.00 0.0
May 2
 19.0 3.0 0.10 0.0
May 3
 22.0 10.0 0.00 0.0
May 4
 11.5 7.0 0.00 0.0
May 5
 12.5 -0.5 0.00 0.0
May 6
 15.0 1.0 0.00 0.0
May 7
 16.5 1.0 0.15 0.0
May 8
 6.5 0.0 0.00 0.0
May 9
 5.5 -2.0 0.00 0.0
May 10
 11.0 2.0 0.00 0.0
May 11
 7.0 2.0 0.10 0.0
May 12
 10.0 2.0 0.00 0.0
May 13
 15.0 0.0 0.00 0.0
May 14
 19.0 3.0 0.20 0.0
May 15
 12.0 8.0 2.30 0.0
May 16
 16.0 10.0 0.00 0.0
May 17
 21.0 8.0 0.00 0.0
May 18
 20.0 11.0 0.00 0.0
May 19
 21.0 7.0 0.00 0.0
May 20
 25.0 6.0 0.00 0.0
May 21
 25.0 11.5 0.00 0.0
May 22
 28.0 12.0 0.00 0.0
May 23
 23.5 12.5 0.00 0.0
May 24
 27.5 9.0 0.00 0.0
May 25
 24.0 17.5 0.00 0.0
May 26
 33.0 15.0 0.00 0.0
May 27
 35.0 20.0 0.00 0.0
May 28
 30.0 19.5 0.00 0.0
May 29
 31.0 20.0 0.11 0.0
May 30
 22.5 12.5 0.98 0.0
May 31
 13.0 4.0 0.00 0.0
June 2020 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
June 1
 16.0 5.0 0.00 0.0
June 2
 19.0 8.0 0.10 0.0
June 3
 17.0 13.0 0.00 0.0
June 4
 25.0 14.0 0.00 0.0
June 5
 30.0 14.0 0.20 0.0
June 6
 27.0 17.0 0.70 0.0
June 7
 27.0 11.0 0.00 0.0
June 8
 24.0 9.0 0.16 0.0
June 9
 21.0 14.0 0.18 0.0
June 10
 31.0 14.0 0.00 0.0
June 11
 25.0 22.0 0.00 0.0
June 12
 21.0 15.0 0.00 0.0
June 13
 17.0 6.0 0.00 0.0
June 14
 22.5 8.0 0.00 0.0
June 15
 24.5 6.5 0.00 0.0
June 16
 28.5 9.0 0.00 0.0
June 17
 31.0 13.0 0.00 0.0
June 18
 33.0 14.5 0.00 0.0
June 19
 32.5 19.0 0.00 0.0
June 20
 33.0 17.5 0.00 0.0
June 21
 34.0 19.0 0.00 0.0
June 22
 35.0 22.0 0.00 0.0
June 23
 34.0 23.0 0.20 0.0
June 24
 24.0 13.0 0.00 0.0
June 25
 29.0 15.0 0.00 0.0
June 26
 29.0 23.0 0.00 0.0
June 27
 29.0 18.0 0.10 0.0
June 28
 29.0 18.0 2.20 0.0
June 29
 25.0 16.0 0.00 0.0
June 30
 25.0 19.0 0.00 0.0
July 2020 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
July 1
 30.5 16.0 0.00 0.0
July 2
 30.5 19.0 0.10 0.0
July 3
 30.0 20.0 0.00 0.0
July 4
 32.0 16.0 0.00 0.0
July 5
 31.0 16.0 0.00 0.0
July 6
 31.5 14.5 0.00 0.0
July 7
 35.0 16.5 0.00 0.0
July 8
 34.0 23.0 0.20 0.0
July 9
 36.0 21.0 0.00 0.0
July 10
 37.5 22.5 0.32 0.0
July 11
 29.0 22.0 3.88 0.0
July 12
 28.0 21.0 0.08 0.0
July 13
 28.0 19.0 0.05 0.0
July 14
 28.0 18.0 0.00 0.0
July 15
 27.0 15.0 0.00 0.0
July 16
 31.0 18.0 0.40 0.0
July 17
 30.0 20.0 0.00 0.0
July 18
 32.0 20.0 0.00 0.0
July 19
 33.0 23.0 0.40 0.0
July 20
 28.5 22.0 0.00 0.0
July 21
 26.0 17.0 0.00 0.0
July 22
 26.0 16.0 0.40 0.0
July 23
 26.0 18.0 0.00 0.0
July 24
 30.0 15.0 0.00 0.0
July 25
 31.0 17.0 0.00 0.0
July 26
 32.0 21.5 0.76 0.0
July 27
 32.0 22.0 0.40 0.0
July 28
 30.0 22.5 0.00 0.0
July 29
 29.0 19.0 0.00 0.0
July 30
 29.5 18.5 0.00 0.0
July 31
 30.0 16.0 0.00 0.0
August 2020 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
August 1
 31.0 17.0 0.00 0.0
August 2
 29.0 19.0 3.10 0.0
August 3
 28.0 18.0 0.10 0.0
August 4
 22.0 18.0 3.30 0.0
August 5
 25.0 17.0 0.10 0.0
August 6
 26.0 15.0 0.00 0.0
August 7
 28.0 14.0 0.00 0.0
August 8
 30.0 15.0 0.00 0.0
August 9
 27.0 17.0 0.10 0.0
August 10
 30.0 18.0 0.00 0.0
August 11
 32.5 21.0 0.10 0.0
August 12
 29.0 20.0 0.00 0.0
August 13
 30.0 18.0 0.00 0.0
August 14
 27.0 18.0 0.00 0.0
August 15
 29.0 14.0 0.00 0.0
August 16
 30.0 18.0 0.98 0.0
August 17
 26.5 17.0 0.50 0.0
August 18
 25.0 16.0 0.50 0.0
August 19
 23.0 12.5 0.00 0.0
August 20
 22.5 11.0 0.16 0.0
August 21
 25.0 17.5 0.00 0.0
August 22
 27.5 15.0 0.64 0.0
August 23
 30.0 17.5 0.80 0.0
August 24
 29.0 18.0 0.15 0.0
August 25
 26.0 22.0 0.00 0.0
August 26
 20.0 9.0 0.00 0.0
August 27
 18.0 11.0 0.30 0.0
August 28
 24.0 14.0 0.90 0.0
August 29
 20.0 15.0 2.05 0.0
August 30
 22.0 12.0 0.00 0.0
August 31
 23.0 11.0 0.00 0.0
September 2020 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
September 1
 25.0 16.0 0.00 0.0
September 2
 27.0 21.0 0.40 0.0
September 3
 25.0 14.0 0.10 0.0
September 4
 22.5 14.0 0.00 0.0
September 5
 22.0 11.0 0.00 0.0
September 6
 21.5 13.0 0.20 0.0
September 7
 27.0 11.0 0.50 0.0
September 8
 21.0 13.0 0.56 0.0
September 9
 17.5 12.0 0.00 0.0
September 10
 17.5 13.5 0.00 0.0
September 11
 18.0 10.0 0.00 0.0
September 12
 22.0 4.5 0.00 0.0
September 13
 20.0 15.0 1.21 0.0
September 14
 16.0 10.0 0.00 0.0
September 15
 16.0 4.0 0.00 0.0
September 16
 24.0 11.0 0.00 0.0
September 17
 17.0 13.0 0.00 0.0
September 18
 15.0 2.0 0.00 0.0
September 19
 15.0 1.0 0.00 0.0
September 20
 15.0 3.0 0.00 0.0
September 21
 17.0 0.0 0.00 0.0
September 22
 19.0 0.0 0.00 0.0
September 23
 23.0 10.0 0.00 0.0
September 24
 23.0 13.0 0.00 0.0
September 25
 19.0 12.0 0.00 0.0
September 26
 28.0 8.0 0.00 0.0
September 27
 28.5 17.0 0.00 0.0
September 28
 28.0 18.0 0.00 0.0
September 29
 21.0 15.5 2.26 0.0
September 30
 16.5 11.5 0.64 0.0
October 2020 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
October 1
 19.0 10.0 0.30 0.0
October 2
 13.5 7.5 0.22 0.0
October 3
 12.5 5.0 0.00 0.0
October 4
 17.5 6.0 0.00 0.0
October 5
 17.0 8.0 0.10 0.0
October 6
 18.0 7.0 0.00 0.0
October 7
 16.0 9.0 1.65 0.0
October 8
 10.0 4.0 0.00 0.0
October 9
 19.0 1.0 0.00 0.0
October 10
 23.0 9.0 0.20 0.0
October 11
 12.0 1.0 0.00 0.0
October 12
 17.0 0.0 0.62 0.0
October 13
 13.0 8.0 0.68 0.0
October 14
 16.0 7.0 0.00 0.0
October 15
 24.0 7.0 1.06 0.0
October 16
 11.0 9.0 0.30 0.0
October 17
 14.0 2.0 0.00 0.0
October 18
 15.5 3.0 0.00 0.0
October 19
 10.0 7.5 2.68 0.0
October 20
 10.0 5.0 0.54 0.0
October 21
 21.0 3.0 0.20 0.0
October 22
 14.0 7.0 0.04 0.0
October 23
 26.5 9.0 0.46 0.0
October 24
 9.5 4.5 0.00 0.0
October 25
 7.0 -1.0 0.20 0.0
October 26
 6.0 3.0 0.40 0.0
October 27
 5.0 -1.0 0.10 0.0
October 28
 10.0 0.0 0.01 0.0
October 29
 7.0 5.0 0.00 0.0
October 30
 4.0 -4.0 0.00 0.0
October 31
 7.0 -5.0 0.02 0.0
November 2020 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
November 1
 13.0 -2.0 0.30 0.0
November 2
 1.0 -1.0 0.00 0.0
November 3
 0.0 -2.0 0.00 0.0
November 4
 15.0 -1.0 0.00 0.0
November 5
 21.0 13.0 0.00 0.0
November 6
 20.0 13.0 0.00 0.0
November 7
 21.0 11.0 0.00 0.0
November 8
 21.0 11.0 0.00 0.0
November 9
 22.0 8.0 0.00 0.0
November 10
 24.0 7.0 0.04 0.0
November 11
 20.0 13.0 0.00 0.0
November 12
 7.5 3.0 0.00 0.0
November 13
 7.0 -2.5 0.00 0.0
November 14
 5.0 2.5 0.00 0.0
November 15
 10.0 -5.0 0.70 0.0
November 16
 8.0 5.0 0.10 0.0
November 17
 3.0 -1.0 0.00 0.0
November 18
 -3.0 -8.0 0.00 0.0
November 19
 15.0 -8.0 0.00 0.0
November 20
 16.0 7.0 0.00 0.0
November 21
 5.0 3.0 0.00 0.0
November 22
 4.0 -7.0 1.56 3.0
November 23
 0.0 -1.0 0.00 0.0
November 24
 -4.0 -5.0 0.30 3.0
November 25
 1.0 -7.0 0.90 9.0
November 26
 7.0 -2.0 0.00 0.0
November 27
 7.0 2.0 0.00 0.0
November 28
 6.0 4.0 0.00 0.0
November 29
 8.0 2.0 0.00 0.0
November 30
 7.0 -0.5 0.96 0.0
December 2020 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
December 1
 8.0 4.0 0.78 0.0
December 2
 3.0 -1.0 0.00 0.0
December 3
 6.0 -3.0 0.06 0.0
December 4
 4.5 1.0 0.55 0.0
December 5
 3.0 0.0 0.00 0.0
December 6
 0.0 -4.0 0.00 0.0
December 7
 -4.0 -5.0 0.00 0.0
December 8
 0.0 -7.0 0.20 2.0
December 9
 1.0 -7.0 0.10 1.0
December 10
 7.0 -2.0 0.00 0.0
December 11
 7.0 0.0 0.00 0.0
December 12
 10.0 0.0 0.10 0.0
December 13
 7.0 1.0 0.00 0.0
December 14
 -1.0 -2.0 0.10 1.0
December 15
 -10.0 -11.0 0.00 0.0
December 16
 -12.0 -18.0 0.00 0.0
December 17
 -8.0 -13.0 0.00 0.0
December 18
 -6.0 -15.0 0.00 0.0
December 19
 -1.0 -13.0 0.00 0.0
December 20
 3.0 -4.0 0.40 4.0
December 21
 5.5 -1.5 0.04 0.0
December 22
 3.0 -0.5 0.00 0.0
December 23
 6.5 -9.0 0.00 0.0
December 24
 12.0 -5.0 3.20 0.0
December 25
 11.0 3.5 0.30 1.0
December 26
 -3.0 -6.0 0.00 0.0
December 27
 1.0 -8.5 0.00 0.0
December 28
 4.0 -5.0 0.05 0.0
December 29
 -5.0 -10.0 0.00 0.0
December 30
 1.0 -10.0 0.10 1.0
December 31
 3.0 -5.0 0.00 0.0
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