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Cornwall Weather in 2018

Historical record of Cornwall, Ontario weather for the year 2018 based on NOAA data.
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Year:
2018 Cornwall Weather Extremes
Highest temperature 35.5 °C July 16
Lowest temperature -27.0 °C January 1
Highest daily low 24.0 °C July 1
Lowest daily high -21.0 °C January 5
Most daily precipitation 4.1 cm September 21
Most daily snow 20.0 cm February 7
Total annual precipitation 85.1 cm -
Total annual snow 215.0 cm -
What was the hottest temperature in Cornwall in 2018?
The highest temperature recorded in Cornwall, Ontario in 2018 was 35.5 °C which happened on July 16.
Highest Temperatures: All-Time By Year
Highest Temperatures in Cornwall in 2018
Rank Temperature Date
1 35.5 °C Jul 16
2 35.0 °C Jul 5
2 35.0 °C Jul 4
2 35.0 °C Jul 2
2 35.0 °C Jul 1
6 34.0 °C Sep 5
6 34.0 °C Aug 5
8 33.5 °C Aug 6
9 33.0 °C Sep 3
10 32.5 °C Jul 20
10 32.5 °C Jun 30
What was the coldest temperature in Cornwall in 2018?
The lowest temperature recorded in Cornwall, Ontario in 2018 was -27.0 °C which happened on Jan 1.
Lowest Temperatures: All-Time By Year
Lowest Temperatures in Cornwall in 2018
Rank Temperature Date
1 -27.0 °C January 1
2 -25.0 °C January 15
2 -25.0 °C January 7
2 -25.0 °C January 6
5 -24.0 °C January 14
6 -23.0 °C January 5
6 -23.0 °C January 2
8 -19.0 °C February 3
8 -19.0 °C February 2
10 -18.5 °C January 16
January 2018 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
January 1
 -18.0 -27.0 0.00 0.0
January 2
 -6.0 -23.0 0.60 6.0
January 3
 -6.0 -9.0 0.00 0.0
January 4
 -7.0 -8.0 0.10 1.0
January 5
 -21.0 -23.0 0.00 0.0
January 6
 -19.0 -25.0 0.00 0.0
January 7
 -4.5 -25.0 0.20 2.0
January 8
 2.0 -10.0 0.70 7.0
January 9
 1.0 -2.0 0.00 0.0
January 10
 7.5 -15.0 0.00 0.0
January 11
 12.5 -5.0 1.40 0.0
January 12
 14.0 5.5 3.36 18.0
January 13
 -13.5 -13.5 0.80 8.0
January 14
 -16.5 -24.0 0.00 0.0
January 15
 -15.0 -25.0 0.20 2.0
January 16
 -11.0 -18.5 0.30 3.0
January 17
 -5.0 -12.5 0.00 0.0
January 18
 -3.0 -8.0 0.00 0.0
January 19
 4.0 -5.0 0.00 0.0
January 20
 4.5 -2.0 0.00 0.0
January 21
 2.0 0.0 0.00 0.0
January 22
 -1.0 -8.0 0.15 0.0
January 23
 1.0 -7.0 0.50 0.0
January 24
 -8.0 -12.0 0.00 0.0
January 25
 -9.0 -16.0 0.00 0.0
January 26
 -5.0 -18.0 0.00 0.0
January 27
 9.0 -12.0 0.10 0.0
January 28
 5.0 0.0 0.00 0.0
January 29
 -8.0 -9.0 0.00 0.0
January 30
 -8.0 -11.0 0.00 0.0
January 31
 -5.0 -17.0 0.30 3.0
February 2018 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
February 1
 6.5 -9.0 0.10 1.0
February 2
 -14.0 -19.0 0.00 0.0
February 3
 0.0 -19.0 0.40 4.0
February 4
 2.0 -7.0 0.30 3.0
February 5
 -7.5 -15.0 0.60 6.0
February 6
 -3.5 -11.5 0.10 1.0
February 7
 -9.5 -15.0 2.00 20.0
February 8
 -5.0 -16.0 0.30 3.0
February 9
 -3.0 -14.0 0.30 3.0
February 10
 -4.0 -9.0 1.30 13.0
February 11
 0.0 -8.5 0.00 0.0
February 12
 -2.0 -8.0 0.00 0.0
February 13
 1.0 -16.0 0.00 0.0
February 14
 6.0 -13.0 0.00 0.0
February 15
 8.0 -4.0 0.00 0.0
February 16
 2.0 -4.0 0.30 3.0
February 17
 0.0 -13.0 0.00 0.0
February 18
 4.0 -6.0 0.00 0.0
February 19
 8.0 -6.0 1.20 0.0
February 20
 15.0 0.5 1.22 0.0
February 21
 15.0 1.5 0.44 0.0
February 22
 -5.0 -7.0 0.00 0.0
February 23
 2.5 -10.0 0.48 0.0
February 24
 2.5 -1.5 0.00 0.0
February 25
 10.0 -4.0 0.60 0.0
February 26
 6.5 0.0 0.00 0.0
February 27
 11.0 -3.5 0.00 0.0
February 28
 15.0 3.0 0.00 0.0
March 2018 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
March 1
 6.5 -1.0 0.00 0.0
March 2
 1.5 -3.0 0.00 0.0
March 3
 5.0 -2.0 0.30 3.0
March 4
 0.0 -4.0 0.30 3.0
March 5
 3.0 -5.0 0.00 0.0
March 6
 3.0 -3.0 0.00 0.0
March 7
 1.0 -3.0 0.30 3.0
March 8
 -1.0 -3.0 1.20 12.0
March 9
 1.0 -3.0 0.00 0.0
March 10
 0.0 -5.0 0.10 1.0
March 11
 1.0 -5.0 0.00 0.0
March 12
 2.5 -2.0 0.50 5.0
March 13
 0.0 -2.5 1.50 15.0
March 14
 1.0 -3.0 0.50 5.0
March 15
 2.0 -4.0 0.00 0.0
March 16
 -4.0 -7.0 0.00 0.0
March 17
 -4.0 -8.0 0.00 0.0
March 18
 -5.0 -15.0 0.00 0.0
March 19
 -4.0 -14.5 0.00 0.0
March 20
 0.0 -12.5 0.00 0.0
March 21
 1.0 -12.5 0.00 0.0
March 22
 5.0 -6.5 0.00 0.0
March 23
 5.5 -3.5 0.00 0.0
March 24
 0.0 -6.5 0.00 0.0
March 25
 3.5 -5.5 0.00 0.0
March 26
 5.0 -8.0 0.00 0.0
March 27
 10.0 -5.0 0.00 0.0
March 28
 8.0 2.0 0.00 0.0
March 29
 10.0 3.0 0.00 0.0
March 30
 8.0 3.0 0.00 0.0
March 31
 10.0 -3.0 0.20 0.0
April 2018 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
April 1
 4.0 1.0 0.00 0.0
April 2
 6.0 -4.0 0.00 0.0
April 3
 6.0 -1.0 1.64 0.0
April 4
 8.0 0.0 0.90 0.0
April 5
 -1.0 -9.0 0.00 0.0
April 6
 5.0 -5.0 0.10 1.0
April 7
 4.0 -2.0 0.00 0.0
April 8
 1.5 -3.0 0.00 0.0
April 9
 3.5 -6.5 0.00 0.0
April 10
 5.5 -3.5 0.10 0.0
April 11
 8.0 -2.0 0.00 0.0
April 12
 11.0 1.0 1.10 0.0
April 13
 10.0 3.0 0.56 0.0
April 14
 2.0 -4.0 0.70 7.0
April 15
 0.0 -5.0 0.00 0.0
April 16
 4.0 -2.0 0.50 0.0
April 17
 3.0 0.0 0.10 0.0
April 18
 7.0 0.0 0.10 0.0
April 19
 5.0 0.0 0.10 0.0
April 20
 9.0 0.0 0.00 0.0
April 21
 12.0 0.0 0.00 0.0
April 22
 15.0 -2.0 0.00 0.0
April 23
 20.0 -1.0 0.00 0.0
April 24
 22.0 5.0 0.00 0.0
April 25
 14.5 11.5 0.60 0.0
April 26
 10.0 7.5 0.00 0.0
April 27
 17.0 5.0 0.48 0.0
April 28
 15.0 6.0 0.36 0.0
April 29
 6.0 5.0 1.84 0.0
April 30
 10.5 4.0 0.40 0.0
May 2018 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
May 1
 19.0 2.5 0.00 0.0
May 2
 26.5 15.0 0.00 0.0
May 3
 20.0 14.0 0.60 0.0
May 4
 20.0 10.0 0.52 0.0
May 5
 22.0 6.5 0.00 0.0
May 6
 20.0 10.5 0.00 0.0
May 7
 16.0 6.0 0.00 0.0
May 8
 22.0 5.0 0.00 0.0
May 9
 27.0 8.0 0.00 0.0
May 10
 23.0 17.0 0.00 0.0
May 11
 13.0 2.0 0.00 0.0
May 12
 19.0 4.0 0.00 0.0
May 13
 23.0 6.0 0.00 0.0
May 14
 25.0 11.0 0.36 0.0
May 15
 20.0 15.0 0.52 0.0
May 16
 25.0 5.0 0.00 0.0
May 17
 21.0 15.0 0.00 0.0
May 18
 18.0 5.0 0.00 0.0
May 19
 18.0 7.0 1.24 0.0
May 20
 19.0 13.0 0.00 0.0
May 21
 24.5 8.0 0.00 0.0
May 22
 n/a n/a n/a n/a
May 23
 n/a n/a n/a n/a
May 24
 n/a n/a n/a n/a
May 25
 n/a n/a n/a n/a
May 26
 n/a n/a n/a n/a
May 27
 n/a n/a n/a n/a
May 28
 n/a n/a n/a n/a
May 29
 n/a n/a n/a n/a
May 30
 n/a n/a n/a n/a
May 31
 n/a n/a n/a n/a
June 2018 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
June 1
 n/a n/a n/a n/a
June 2
 n/a n/a n/a n/a
June 3
 n/a n/a n/a n/a
June 4
 n/a n/a n/a n/a
June 5
 n/a n/a n/a n/a
June 6
 n/a n/a n/a n/a
June 7
 n/a n/a n/a n/a
June 8
 n/a n/a n/a n/a
June 9
 n/a n/a n/a n/a
June 10
 n/a n/a n/a n/a
June 11
 24.0 n/a 0.00 0.0
June 12
 27.0 8.0 0.00 0.0
June 13
 24.5 16.0 0.94 0.0
June 14
 17.5 14.5 0.54 0.0
June 15
 25.5 12.0 0.00 0.0
June 16
 28.0 13.0 0.00 0.0
June 17
 30.0 14.0 0.00 0.0
June 18
 30.0 24.0 1.85 0.0
June 19
 26.0 13.0 0.00 0.0
June 20
 24.0 13.0 0.00 0.0
June 21
 21.0 15.0 0.00 0.0
June 22
 25.0 9.0 0.05 0.0
June 23
 22.0 16.0 0.42 0.0
June 24
 24.0 15.0 0.36 0.0
June 25
 21.5 11.0 0.00 0.0
June 26
 23.5 9.0 0.00 0.0
June 27
 28.0 14.0 0.20 0.0
June 28
 25.0 18.0 0.00 0.0
June 29
 31.0 18.5 0.00 0.0
June 30
 32.5 21.0 0.00 0.0
July 2018 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
July 1
 35.0 24.0 0.00 0.0
July 2
 35.0 23.5 0.00 0.0
July 3
 32.0 21.5 0.00 0.0
July 4
 35.0 19.0 0.00 0.0
July 5
 35.0 22.5 0.00 0.0
July 6
 24.0 19.5 0.00 0.0
July 7
 28.5 11.5 0.00 0.0
July 8
 30.0 16.5 0.00 0.0
July 9
 32.0 18.0 0.00 0.0
July 10
 30.0 20.0 0.60 0.0
July 11
 27.0 14.0 0.00 0.0
July 12
 29.0 15.0 0.00 0.0
July 13
 30.0 15.0 0.20 0.0
July 14
 31.0 20.0 0.00 0.0
July 15
 32.0 21.0 0.00 0.0
July 16
 35.5 19.0 0.82 0.0
July 17
 31.5 21.5 0.00 0.0
July 18
 25.0 14.0 0.00 0.0
July 19
 29.0 13.0 0.00 0.0
July 20
 32.5 14.0 0.00 0.0
July 21
 32.0 19.0 0.14 0.0
July 22
 29.0 18.0 0.52 0.0
July 23
 31.5 21.0 0.02 0.0
July 24
 31.0 23.5 2.12 0.0
July 25
 26.0 22.0 1.50 0.0
July 26
 30.0 21.5 0.00 0.0
July 27
 29.5 20.0 0.00 0.0
July 28
 26.5 17.5 0.00 0.0
July 29
 28.0 18.0 0.00 0.0
July 30
 29.0 17.0 0.00 0.0
July 31
 30.0 19.0 0.00 0.0
August 2018 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
August 1
 30.0 22.0 0.00 0.0
August 2
 29.0 22.0 0.00 0.0
August 3
 30.0 21.0 0.00 0.0
August 4
 30.0 21.0 0.20 0.0
August 5
 34.0 20.0 0.00 0.0
August 6
 33.5 23.0 0.42 0.0
August 7
 28.0 21.0 0.10 0.0
August 8
 27.0 20.0 2.40 0.0
August 9
 27.5 20.0 0.10 0.0
August 10
 27.0 15.0 0.00 0.0
August 11
 29.0 14.0 0.00 0.0
August 12
 29.0 15.0 0.00 0.0
August 13
 29.0 19.0 0.00 0.0
August 14
 29.5 21.5 0.22 0.0
August 15
 28.5 20.0 0.00 0.0
August 16
 26.0 17.0 0.00 0.0
August 17
 26.5 18.0 0.00 0.0
August 18
 25.0 17.0 0.00 0.0
August 19
 29.0 14.0 0.00 0.0
August 20
 29.0 18.0 0.00 0.0
August 21
 27.0 18.0 0.80 0.0
August 22
 24.0 20.0 0.00 0.0
August 23
 27.0 12.0 0.00 0.0
August 24
 30.0 18.0 0.00 0.0
August 25
 31.0 17.0 0.05 0.0
August 26
 27.5 19.0 0.64 0.0
August 27
 27.5 19.0 0.24 0.0
August 28
 31.0 22.0 0.00 0.0
August 29
 32.0 22.0 0.00 0.0
August 30
 22.0 14.5 0.00 0.0
August 31
 25.0 11.0 0.00 0.0
September 2018 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
September 1
 30.0 19.0 0.00 0.0
September 2
 29.0 20.0 0.22 0.0
September 3
 33.0 22.5 0.46 0.0
September 4
 27.0 19.0 0.00 0.0
September 5
 34.0 20.0 0.00 0.0
September 6
 26.0 21.5 0.00 0.0
September 7
 24.0 11.0 0.00 0.0
September 8
 19.5 9.0 0.00 0.0
September 9
 18.0 5.5 0.00 0.0
September 10
 18.0 8.0 1.00 0.0
September 11
 21.0 13.0 0.00 0.0
September 12
 26.0 17.0 0.00 0.0
September 13
 28.0 13.0 0.00 0.0
September 14
 30.0 16.0 0.00 0.0
September 15
 32.0 19.0 0.20 0.0
September 16
 30.0 20.0 0.00 0.0
September 17
 30.0 20.0 0.00 0.0
September 18
 26.0 20.0 0.00 0.0
September 19
 18.0 13.0 0.00 0.0
September 20
 17.0 9.0 1.40 0.0
September 21
 28.0 15.0 4.06 0.0
September 22
 16.5 10.0 0.00 0.0
September 23
 28.0 6.5 0.00 0.0
September 24
 17.0 7.0 0.80 0.0
September 25
 22.0 8.0 0.70 0.0
September 26
 24.0 17.0 0.00 0.0
September 27
 18.5 9.0 0.00 0.0
September 28
 22.5 13.0 0.80 0.0
September 29
 18.0 9.0 0.00 0.0
September 30
 14.0 7.5 0.30 0.0
October 2018 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
October 1
 13.0 7.0 0.90 0.0
October 2
 10.0 8.0 1.00 0.0
October 3
 20.0 9.0 0.00 0.0
October 4
 25.0 11.0 0.40 0.0
October 5
 12.0 2.0 0.00 0.0
October 6
 12.0 6.0 0.00 0.0
October 7
 11.0 9.0 0.00 0.0
October 8
 12.0 6.5 0.00 0.0
October 9
 28.0 9.0 0.00 0.0
October 10
 26.0 19.0 0.56 0.0
October 11
 13.0 10.0 0.24 0.0
October 12
 13.0 9.0 0.00 0.0
October 13
 10.0 6.5 0.00 0.0
October 14
 14.0 2.5 0.00 0.0
October 15
 14.0 4.0 0.56 0.0
October 16
 10.0 4.5 0.04 0.0
October 17
 10.0 7.0 0.00 0.0
October 18
 6.0 -1.0 0.00 0.0
October 19
 16.0 3.5 0.16 0.0
October 20
 14.5 9.0 0.00 0.0
October 21
 4.0 1.0 0.00 0.0
October 22
 6.0 0.0 0.00 0.0
October 23
 10.0 2.0 0.00 0.0
October 24
 11.0 1.0 0.00 0.0
October 25
 3.0 1.0 0.00 0.0
October 26
 6.0 -4.0 0.00 0.0
October 27
 5.0 0.0 0.20 0.0
October 28
 5.0 2.0 0.36 0.0
October 29
 7.5 3.0 0.22 0.0
October 30
 5.0 1.5 0.00 0.0
October 31
 6.0 0.0 1.12 0.0
November 2018 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
November 1
 8.5 4.5 1.96 0.0
November 2
 4.5 4.0 0.22 0.0
November 3
 4.5 2.5 1.26 0.0
November 4
 7.0 2.0 0.00 0.0
November 5
 7.5 1.5 0.00 0.0
November 6
 15.0 5.5 0.50 0.0
November 7
 12.5 9.5 0.00 0.0
November 8
 8.0 4.0 0.00 0.0
November 9
 5.5 -2.5 0.90 0.0
November 10
 4.0 1.5 0.00 0.0
November 11
 1.5 -4.5 0.00 0.0
November 12
 7.0 -2.0 0.40 0.0
November 13
 4.0 1.0 0.10 0.0
November 14
 -6.0 -9.0 0.00 0.0
November 15
 -2.5 -11.0 0.80 8.0
November 16
 3.0 -5.0 0.40 4.0
November 17
 4.0 -3.0 0.00 0.0
November 18
 1.0 -8.0 0.00 0.0
November 19
 4.0 -2.0 0.00 0.0
November 20
 -1.0 -5.0 1.00 10.0
November 21
 -1.0 -7.5 0.80 8.0
November 22
 -10.0 -15.0 0.00 0.0
November 23
 -2.0 -16.0 0.00 0.0
November 24
 5.0 -9.5 1.30 0.0
November 25
 7.5 1.0 0.00 0.0
November 26
 4.5 2.0 1.06 3.0
November 27
 1.0 0.0 0.74 4.0
November 28
 2.5 0.0 0.14 0.0
November 29
 2.5 0.5 0.00 0.0
November 30
 1.0 0.5 0.00 0.0
December 2018 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
December 1
 4.5 -0.5 0.20 0.0
December 2
 6.0 -0.5 0.65 0.0
December 3
 7.0 0.0 0.30 1.0
December 4
 -3.0 -5.0 0.00 0.0
December 5
 -1.0 -6.0 0.30 3.0
December 6
 2.0 -4.0 0.00 0.0
December 7
 -9.0 -11.0 0.00 0.0
December 8
 -2.0 -17.0 0.00 0.0
December 9
 3.0 -9.0 0.00 0.0
December 10
 -5.0 -10.0 0.00 0.0
December 11
 -4.0 -12.5 0.50 5.0
December 12
 -6.0 -8.5 0.00 0.0
December 13
 -5.5 -14.0 0.00 0.0
December 14
 4.5 -8.0 0.50 0.0
December 15
 5.0 1.0 0.00 0.0
December 16
 2.0 -3.0 0.00 0.0
December 17
 2.0 -1.0 0.04 0.0
December 18
 -5.0 -8.5 0.00 0.0
December 19
 2.0 -10.0 0.00 0.0
December 20
 6.0 -7.0 0.00 0.0
December 21
 8.0 -5.0 0.79 2.0
December 22
 -1.0 -3.5 0.00 0.0
December 23
 -6.0 -10.0 0.00 0.0
December 24
 -4.0 -11.0 0.20 2.0
December 25
 -9.0 -14.0 0.00 0.0
December 26
 -1.0 -13.0 0.30 3.0
December 27
 0.0 -16.0 0.00 0.0
December 28
 9.0 -10.0 0.50 0.0
December 29
 -1.0 -7.0 0.00 0.0
December 30
 -3.5 -13.0 0.00 0.0
December 31
 2.5 -5.0 2.00 0.0
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