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Cornwall Weather in 1978

Historical record of Cornwall, Ontario weather for the year 1978 based on NOAA data.
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1978 Cornwall Weather Extremes
Highest temperature 33.0 °C July 20
Lowest temperature -26.0 °C February 5
Highest daily low 23.0 °C July 21
Lowest daily high -16.0 °C February 5
Most daily precipitation 3.8 cm January 8
Most daily snow 23.2 cm December 25
Total annual precipitation 92.5 cm -
Total annual snow 277.6 cm -
What was the hottest temperature in Cornwall in 1978?
The highest temperature recorded in Cornwall, Ontario in 1978 was 33.0 °C which happened on July 20.
Highest Temperatures: All-Time By Year
Highest Temperatures in Cornwall in 1978
Rank Temperature Date
1 33.0 °C Jul 20
2 32.5 °C Aug 15
3 31.5 °C Jul 7
4 31.0 °C May 30
4 31.0 °C May 28
6 30.5 °C Aug 16
6 30.5 °C Aug 14
6 30.5 °C Jul 8
6 30.5 °C May 29
10 30.0 °C Jul 25
10 30.0 °C Jul 23
10 30.0 °C Jul 18
10 30.0 °C Jul 5
10 30.0 °C Jun 12
10 30.0 °C May 27
What was the coldest temperature in Cornwall in 1978?
The lowest temperature recorded in Cornwall, Ontario in 1978 was -26.0 °C which happened on Feb 5.
Lowest Temperatures: All-Time By Year
Lowest Temperatures in Cornwall in 1978
Rank Temperature Date
1 -26.0 °C February 5
2 -24.0 °C February 4
3 -23.0 °C February 3
4 -21.0 °C December 19
4 -21.0 °C January 17
4 -21.0 °C January 10
7 -20.0 °C March 1
8 -19.5 °C January 29
8 -19.5 °C January 4
10 -19.0 °C March 5
10 -19.0 °C February 14
10 -19.0 °C February 10
10 -19.0 °C January 16
January 1978 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
January 1
 -10.0 -16.5 1.20 12.0
January 2
 -10.0 -14.0 0.99 9.9
January 3
 -8.0 -14.0 0.00 0.0
January 4
 -9.0 -19.5 0.00 0.0
January 5
 -5.0 -12.0 0.50 5.0
January 6
 -12.0 -16.0 0.30 3.0
January 7
 -11.0 -16.0 0.54 5.4
January 8
 6.0 -11.0 3.75 0.0
January 9
 3.0 -16.0 1.08 8.8
January 10
 -14.0 -21.0 0.50 5.0
January 11
 -9.5 -15.5 0.50 5.0
January 12
 -13.0 -18.0 0.00 0.0
January 13
 -12.0 -18.0 0.50 5.0
January 14
 -11.0 -14.5 1.00 10.0
January 15
 -12.0 -14.5 0.20 2.0
January 16
 -12.0 -19.0 0.00 0.0
January 17
 -11.0 -21.0 1.50 15.0
January 18
 -7.0 -13.0 0.60 6.0
January 19
 -10.0 -17.5 0.00 0.0
January 20
 -12.0 -17.0 1.62 16.2
January 21
 -8.0 -14.0 0.23 2.3
January 22
 -3.0 -13.0 0.00 0.0
January 23
 -2.0 -6.0 0.18 1.8
January 24
 1.0 -6.0 0.15 1.5
January 25
 2.0 -2.0 1.57 0.0
January 26
 4.0 -4.0 0.84 0.0
January 27
 -5.5 -8.0 0.80 8.0
January 28
 -9.0 -12.0 0.00 0.0
January 29
 -12.0 -19.5 0.20 2.0
January 30
 -12.0 -15.5 0.00 0.0
January 31
 -10.0 -17.5 0.00 0.0
February 1978 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
February 1
 -9.5 -12.0 0.00 0.0
February 2
 -12.0 -15.0 0.00 0.0
February 3
 -14.0 -23.0 0.00 0.0
February 4
 -14.0 -24.0 0.00 0.0
February 5
 -16.0 -26.0 0.00 0.0
February 6
 -6.0 -17.5 1.50 15.0
February 7
 -7.0 -11.0 2.10 21.0
February 8
 -6.0 -12.0 0.00 0.0
February 9
 -4.0 -18.0 0.00 0.0
February 10
 -9.5 -19.0 0.00 0.0
February 11
 -5.5 -14.5 0.24 2.4
February 12
 -5.0 -9.5 0.00 0.0
February 13
 -9.0 -13.0 0.00 0.0
February 14
 -8.0 -19.0 0.00 0.0
February 15
 -5.0 -18.0 0.00 0.0
February 16
 -4.0 -16.0 0.00 0.0
February 17
 0.0 -11.0 0.02 0.2
February 18
 -4.0 -10.0 0.00 0.0
February 19
 -8.0 -16.0 0.00 0.0
February 20
 -5.5 -17.5 0.00 0.0
February 21
 -7.0 -15.0 0.00 0.0
February 22
 -6.0 -14.0 0.00 0.0
February 23
 -2.0 -8.0 0.08 0.8
February 24
 -0.5 -7.0 0.00 0.0
February 25
 -3.0 -13.5 0.00 0.0
February 26
 -4.5 -14.0 0.00 0.0
February 27
 -6.0 -13.5 0.00 0.0
February 28
 -5.0 -15.0 0.00 0.0
March 1978 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
March 1
 -7.0 -20.0 0.00 0.0
March 2
 -5.0 -18.5 0.00 0.0
March 3
 -5.0 -15.0 0.25 2.5
March 4
 -6.0 -12.0 0.00 0.0
March 5
 -8.0 -19.0 0.00 0.0
March 6
 -5.0 -12.5 0.00 0.0
March 7
 -5.5 -14.0 0.00 0.0
March 8
 -3.0 -15.0 0.00 0.0
March 9
 2.0 -11.0 0.00 0.0
March 10
 3.0 -2.0 0.00 0.0
March 11
 4.0 -6.0 0.00 0.0
March 12
 4.0 0.0 0.00 0.0
March 13
 5.0 -7.5 0.00 0.0
March 14
 7.0 -2.0 1.64 0.0
March 15
 1.5 -2.5 0.00 0.0
March 16
 -4.5 -10.0 0.00 0.0
March 17
 -3.0 -11.5 0.00 0.0
March 18
 0.0 -8.0 0.30 3.0
March 19
 5.0 -3.0 0.00 0.0
March 20
 -1.5 -11.5 0.10 1.0
March 21
 0.5 -6.0 1.44 3.0
March 22
 3.0 -2.0 0.40 4.0
March 23
 4.0 -1.0 0.00 0.0
March 24
 -4.5 -9.0 0.00 0.0
March 25
 -2.0 -12.0 0.00 0.0
March 26
 0.5 -5.5 2.10 13.2
March 27
 2.5 -2.0 0.73 1.0
March 28
 5.0 0.0 0.00 0.0
March 29
 3.5 0.5 0.00 0.0
March 30
 3.5 -4.0 0.00 0.0
March 31
 6.0 0.0 0.10 1.0
April 1978 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
April 1
 11.0 0.0 1.51 0.0
April 2
 0.0 -5.0 0.00 0.0
April 3
 1.5 -7.5 0.00 0.0
April 4
 2.0 -3.5 0.98 0.0
April 5
 4.0 0.5 0.00 0.0
April 6
 4.5 -3.0 0.00 0.0
April 7
 2.5 -0.5 0.74 2.0
April 8
 0.5 -3.5 0.00 0.0
April 9
 1.0 -6.5 0.00 0.0
April 10
 4.0 -5.0 1.10 0.0
April 11
 8.0 -1.0 1.21 0.0
April 12
 7.5 3.0 0.14 0.0
April 13
 15.0 2.0 0.00 0.0
April 14
 6.5 0.0 0.00 0.0
April 15
 5.0 -1.0 0.00 0.0
April 16
 10.0 -0.5 0.00 0.0
April 17
 11.5 2.0 0.00 0.0
April 18
 12.5 -1.0 0.00 0.0
April 19
 11.0 4.0 0.78 0.0
April 20
 6.0 4.0 1.14 0.0
April 21
 5.5 1.0 0.20 0.0
April 22
 9.5 0.0 0.00 0.0
April 23
 11.5 0.0 0.00 0.0
April 24
 14.5 1.5 0.00 0.0
April 25
 13.5 5.0 0.00 0.0
April 26
 16.5 1.0 0.00 0.0
April 27
 16.0 2.5 0.00 0.0
April 28
 18.0 3.0 0.00 0.0
April 29
 16.0 3.0 0.00 0.0
April 30
 4.0 -5.0 0.00 0.0
May 1978 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
May 1
 1.5 -2.0 0.00 0.0
May 2
 7.5 0.0 0.00 0.0
May 3
 6.5 1.0 0.00 0.0
May 4
 12.0 0.0 0.00 0.0
May 5
 17.0 4.0 0.00 0.0
May 6
 17.5 5.5 0.00 0.0
May 7
 20.5 6.5 0.00 0.0
May 8
 23.0 7.0 0.92 0.0
May 9
 21.0 10.0 2.00 0.0
May 10
 13.5 8.5 0.18 0.0
May 11
 19.0 4.5 0.00 0.0
May 12
 24.5 10.5 0.10 0.0
May 13
 24.0 14.0 0.32 0.0
May 14
 21.5 14.0 0.12 0.0
May 15
 14.5 11.0 0.96 0.0
May 16
 21.0 10.5 0.10 0.0
May 17
 21.0 12.0 1.70 0.0
May 18
 20.0 12.5 0.00 0.0
May 19
 24.5 10.5 0.00 0.0
May 20
 25.5 16.0 0.40 0.0
May 21
 19.5 9.0 0.00 0.0
May 22
 21.0 7.5 0.00 0.0
May 23
 26.5 9.0 0.00 0.0
May 24
 28.0 12.0 0.00 0.0
May 25
 28.5 13.5 0.00 0.0
May 26
 29.0 14.0 0.00 0.0
May 27
 30.0 15.0 0.00 0.0
May 28
 31.0 15.5 0.00 0.0
May 29
 30.5 17.0 0.00 0.0
May 30
 31.0 16.5 0.00 0.0
May 31
 27.0 19.0 0.75 0.0
June 1978 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
June 1
 19.0 15.0 0.00 0.0
June 2
 27.0 14.0 0.22 0.0
June 3
 20.0 13.0 0.00 0.0
June 4
 19.5 10.0 0.10 0.0
June 5
 16.0 9.0 0.70 0.0
June 6
 20.0 7.0 0.00 0.0
June 7
 26.0 11.5 1.28 0.0
June 8
 22.5 15.0 0.00 0.0
June 9
 21.5 12.0 0.24 0.0
June 10
 20.0 6.0 0.00 0.0
June 11
 27.0 12.0 0.00 0.0
June 12
 30.0 20.0 0.31 0.0
June 13
 13.5 10.5 0.50 0.0
June 14
 16.0 7.0 0.03 0.0
June 15
 20.5 7.0 0.00 0.0
June 16
 25.0 8.5 0.00 0.0
June 17
 27.5 16.0 0.12 0.0
June 18
 26.5 18.0 1.22 0.0
June 19
 22.0 18.0 0.78 0.0
June 20
 22.5 15.5 0.08 0.0
June 21
 25.5 15.0 0.10 0.0
June 22
 22.0 16.0 0.18 0.0
June 23
 20.0 12.5 0.10 0.0
June 24
 25.0 10.0 0.00 0.0
June 25
 26.0 13.5 0.00 0.0
June 26
 26.5 15.0 0.00 0.0
June 27
 29.0 20.0 0.40 0.0
June 28
 27.5 18.0 0.00 0.0
June 29
 27.5 17.5 0.03 0.0
June 30
 23.0 11.5 0.00 0.0
July 1978 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
July 1
 22.5 10.5 0.00 0.0
July 2
 23.0 8.5 0.00 0.0
July 3
 26.0 9.0 0.00 0.0
July 4
 27.0 15.0 0.00 0.0
July 5
 30.0 13.0 0.00 0.0
July 6
 29.5 17.5 0.00 0.0
July 7
 31.5 21.0 0.00 0.0
July 8
 30.5 20.0 0.94 0.0
July 9
 25.0 19.5 0.00 0.0
July 10
 25.0 17.5 0.14 0.0
July 11
 20.5 9.5 0.00 0.0
July 12
 28.0 12.0 0.00 0.0
July 13
 29.5 14.5 0.22 0.0
July 14
 27.0 18.0 0.00 0.0
July 15
 29.5 17.0 0.20 0.0
July 16
 27.5 19.0 0.00 0.0
July 17
 27.5 17.0 0.00 0.0
July 18
 30.0 15.0 0.00 0.0
July 19
 29.5 18.0 0.16 0.0
July 20
 33.0 22.0 0.00 0.0
July 21
 29.0 23.0 0.00 0.0
July 22
 28.0 22.0 0.10 0.0
July 23
 30.0 21.0 1.50 0.0
July 24
 26.0 13.0 0.00 0.0
July 25
 30.0 15.0 0.00 0.0
July 26
 25.5 17.5 0.00 0.0
July 27
 27.0 20.0 0.57 0.0
July 28
 23.0 16.0 0.00 0.0
July 29
 19.0 13.5 0.98 0.0
July 30
 20.0 11.0 0.00 0.0
July 31
 25.0 8.0 0.10 0.0
August 1978 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
August 1
 27.0 16.5 0.00 0.0
August 2
 29.5 16.0 0.00 0.0
August 3
 24.0 20.0 1.12 0.0
August 4
 23.0 16.5 0.00 0.0
August 5
 26.5 13.0 0.00 0.0
August 6
 27.0 18.0 0.00 0.0
August 7
 28.5 15.0 0.12 0.0
August 8
 26.0 20.5 2.98 0.0
August 9
 24.0 20.0 0.26 0.0
August 10
 24.0 16.0 0.00 0.0
August 11
 26.5 12.5 0.00 0.0
August 12
 26.5 15.5 0.00 0.0
August 13
 29.0 18.5 0.00 0.0
August 14
 30.5 19.5 0.00 0.0
August 15
 32.5 20.0 0.00 0.0
August 16
 30.5 20.5 2.23 0.0
August 17
 26.0 20.0 0.00 0.0
August 18
 24.5 16.0 0.00 0.0
August 19
 28.0 15.0 1.76 0.0
August 20
 22.0 17.0 0.00 0.0
August 21
 24.0 11.0 0.00 0.0
August 22
 26.0 12.0 0.00 0.0
August 23
 23.0 16.0 1.32 0.0
August 24
 17.0 11.0 0.26 0.0
August 25
 25.0 8.5 0.00 0.0
August 26
 22.0 12.0 0.00 0.0
August 27
 20.5 9.0 0.00 0.0
August 28
 23.0 13.0 0.65 0.0
August 29
 24.0 16.0 0.06 0.0
August 30
 25.0 14.5 0.00 0.0
August 31
 20.0 13.5 0.00 0.0
September 1978 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
September 1
 22.5 11.0 0.00 0.0
September 2
 25.5 13.0 0.00 0.0
September 3
 21.5 17.0 0.68 0.0
September 4
 21.0 9.0 0.00 0.0
September 5
 20.0 14.5 0.00 0.0
September 6
 26.0 12.0 0.57 0.0
September 7
 16.5 13.0 0.00 0.0
September 8
 18.5 6.0 0.00 0.0
September 9
 14.5 8.0 0.00 0.0
September 10
 15.0 5.0 0.00 0.0
September 11
 21.0 11.0 1.32 0.0
September 12
 17.0 10.0 0.00 0.0
September 13
 15.0 4.0 0.00 0.0
September 14
 20.5 4.5 0.10 0.0
September 15
 22.0 15.0 0.02 0.0
September 16
 18.0 15.0 0.00 0.0
September 17
 15.0 4.0 0.00 0.0
September 18
 13.0 3.5 0.00 0.0
September 19
 19.5 6.0 0.00 0.0
September 20
 20.0 7.0 0.03 0.0
September 21
 21.0 16.0 1.57 0.0
September 22
 15.5 10.0 0.00 0.0
September 23
 16.0 3.0 0.00 0.0
September 24
 20.0 6.5 0.00 0.0
September 25
 12.0 9.0 0.03 0.0
September 26
 14.0 0.0 0.00 0.0
September 27
 22.0 10.0 0.20 0.0
September 28
 12.0 7.0 0.00 0.0
September 29
 16.0 2.0 0.00 0.0
September 30
 19.0 9.0 0.00 0.0
October 1978 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
October 1
 18.0 14.0 0.76 0.0
October 2
 13.5 8.0 0.00 0.0
October 3
 12.5 5.0 0.00 0.0
October 4
 13.0 8.0 0.22 0.0
October 5
 18.0 8.0 0.10 0.0
October 6
 18.5 13.0 0.16 0.0
October 7
 10.5 6.0 0.22 0.0
October 8
 5.5 2.0 0.00 0.0
October 9
 12.0 -1.5 0.00 0.0
October 10
 22.0 8.0 0.00 0.0
October 11
 20.0 8.0 0.00 0.0
October 12
 19.0 12.5 0.79 0.0
October 13
 12.0 10.0 0.52 0.0
October 14
 6.0 3.0 2.45 0.0
October 15
 3.0 1.0 0.00 0.0
October 16
 5.5 -4.0 0.00 0.0
October 17
 7.0 -4.0 0.00 0.0
October 18
 10.0 -1.0 0.11 0.0
October 19
 8.0 5.0 0.00 0.0
October 20
 11.0 0.0 0.00 0.0
October 21
 19.0 7.0 0.00 0.0
October 22
 23.0 15.0 0.00 0.0
October 23
 12.0 4.0 0.12 0.0
October 24
 4.0 -4.0 0.00 0.0
October 25
 15.0 3.0 0.50 0.0
October 26
 13.0 10.5 1.51 0.0
October 27
 10.0 4.0 0.10 0.0
October 28
 13.0 6.0 0.00 0.0
October 29
 4.0 -2.0 0.00 0.0
October 30
 11.5 -5.0 0.00 0.0
October 31
 14.0 6.5 0.00 0.0
November 1978 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
November 1
 10.0 -1.0 0.00 0.0
November 2
 14.0 4.0 0.00 0.0
November 3
 14.0 0.5 0.00 0.0
November 4
 18.5 1.0 0.00 0.0
November 5
 16.5 8.0 0.00 0.0
November 6
 17.0 8.5 0.32 0.0
November 7
 6.0 5.0 0.00 0.0
November 8
 8.5 -3.0 0.00 0.0
November 9
 13.0 2.0 0.00 0.0
November 10
 9.0 4.0 0.00 0.0
November 11
 12.0 2.0 0.00 0.0
November 12
 0.0 -1.0 0.00 0.0
November 13
 11.0 -5.0 1.68 0.0
November 14
 14.0 3.5 0.10 0.0
November 15
 7.0 3.0 0.00 0.0
November 16
 7.0 -1.0 0.00 0.0
November 17
 15.0 -4.0 1.92 0.0
November 18
 9.0 4.5 0.06 0.0
November 19
 8.0 1.5 0.00 0.0
November 20
 -6.0 -7.0 0.00 0.0
November 21
 -5.5 -12.0 0.00 0.0
November 22
 -2.0 -13.0 0.00 0.0
November 23
 4.0 -10.0 0.98 7.6
November 24
 5.0 -4.0 0.00 0.0
November 25
 -4.0 -5.0 0.00 0.0
November 26
 -8.5 -13.0 0.00 0.0
November 27
 -8.0 -14.0 1.02 10.2
November 28
 -5.0 -11.5 0.30 3.0
November 29
 4.5 -14.0 0.00 0.0
November 30
 4.0 -2.0 0.00 0.0
December 1978 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
December 1
 2.0 -7.5 0.30 3.0
December 2
 -3.0 -6.5 0.00 0.0
December 3
 -3.0 -18.5 0.20 2.0
December 4
 8.0 -11.5 0.00 0.0
December 5
 4.0 -1.0 0.10 1.0
December 6
 5.5 2.0 0.00 0.0
December 7
 -0.5 -2.5 0.00 0.0
December 8
 0.0 -2.5 0.18 0.8
December 9
 -1.0 -6.0 0.00 0.0
December 10
 -13.0 -17.0 0.00 0.0
December 11
 -3.5 -17.0 0.08 0.8
December 12
 0.0 -8.0 0.24 2.4
December 13
 3.0 -2.0 0.95 7.0
December 14
 -1.0 -9.0 0.54 5.4
December 15
 3.0 -6.0 0.00 0.0
December 16
 6.0 -1.0 0.15 1.5
December 17
 1.5 -3.5 0.10 1.0
December 18
 -12.0 -15.0 0.00 0.0
December 19
 -9.0 -21.0 0.00 0.0
December 20
 -4.5 -15.5 0.30 3.0
December 21
 2.0 -10.0 0.10 1.0
December 22
 2.0 -14.0 0.00 0.0
December 23
 3.0 -7.0 0.00 0.0
December 24
 -2.0 -12.0 0.70 7.0
December 25
 -2.0 -5.0 2.32 23.2
December 26
 -2.0 -5.0 0.35 3.5
December 27
 -7.0 -10.0 0.00 0.0
December 28
 -11.0 -16.0 0.00 0.0
December 29
 -11.0 -15.0 0.00 0.0
December 30
 -6.0 -18.0 0.02 0.2
December 31
 8.0 -9.0 0.22 0.0
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