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Cornwall Weather in 2009

Historical record of Cornwall, Ontario weather for the year 2009 based on NOAA data.
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Year:
2009 Cornwall Weather Extremes
Highest temperature 33.5 °C August 17
Lowest temperature -26.5 °C January 15
Highest daily low 22.0 °C August 18
Lowest daily high -20.5 °C January 14
Most daily precipitation 2.9 cm May 9
Most daily snow 20.0 cm January 28
Total annual precipitation 87.6 cm -
Total annual snow 151.3 cm -
What was the hottest temperature in Cornwall in 2009?
The highest temperature recorded in Cornwall, Ontario in 2009 was 33.5 °C which happened on August 17.
Highest Temperatures: All-Time By Year
Highest Temperatures in Cornwall in 2009
Rank Temperature Date
1 33.5 °C Aug 17
2 32.5 °C Jun 25
3 31.5 °C Aug 16
4 31.0 °C Aug 15
4 31.0 °C Aug 14
4 31.0 °C Apr 27
7 30.0 °C Aug 18
7 30.0 °C Aug 10
7 30.0 °C Aug 4
7 30.0 °C Jul 28
What was the coldest temperature in Cornwall in 2009?
The lowest temperature recorded in Cornwall, Ontario in 2009 was -26.5 °C which happened on Jan 15.
Lowest Temperatures: All-Time By Year
Lowest Temperatures in Cornwall in 2009
Rank Temperature Date
1 -26.5 °C January 15
2 -26.0 °C January 16
3 -25.0 °C January 26
4 -24.0 °C January 14
5 -22.0 °C January 17
6 -21.0 °C February 5
7 -20.5 °C December 19
8 -20.0 °C January 10
9 -19.5 °C December 17
10 -19.0 °C December 30
10 -19.0 °C December 18
10 -19.0 °C February 4
10 -19.0 °C January 25
10 -19.0 °C January 24
10 -19.0 °C January 21
January 2009 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
January 1
 -13.0 -18.0 0.00 0.0
January 2
 -11.0 -14.5 0.40 4.0
January 3
 -8.0 -13.0 0.00 0.0
January 4
 -5.0 -14.0 0.00 0.0
January 5
 -0.1 -10.0 0.05 0.5
January 6
 -2.5 -8.0 1.00 10.0
January 7
 -6.5 -9.0 1.70 17.0
January 8
 -8.0 -10.0 0.00 0.0
January 9
 -11.0 -15.0 0.00 0.0
January 10
 -10.5 -20.0 0.00 0.0
January 11
 -8.0 -16.0 0.00 0.0
January 12
 -3.5 -12.0 0.00 0.0
January 13
 1.0 -4.5 0.40 4.0
January 14
 -20.5 -24.0 0.38 3.8
January 15
 -18.0 -26.5 0.00 0.0
January 16
 -13.5 -26.0 0.10 1.0
January 17
 -9.0 -22.0 0.20 2.0
January 18
 -7.0 -18.0 0.10 1.0
January 19
 -8.0 -12.0 0.20 2.0
January 20
 -10.0 -13.0 0.00 0.0
January 21
 -3.5 -19.0 0.20 2.0
January 22
 -0.5 -7.0 0.00 0.0
January 23
 -4.5 -12.0 0.10 1.0
January 24
 -11.0 -19.0 0.00 0.0
January 25
 -9.5 -19.0 0.10 1.0
January 26
 -9.0 -25.0 0.00 0.0
January 27
 -7.0 -16.0 0.20 2.0
January 28
 -7.0 -15.0 2.00 20.0
January 29
 -4.0 -13.5 0.20 2.0
January 30
 -0.5 -5.0 0.90 9.0
January 31
 -11.0 -17.5 0.00 0.0
February 2009 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
February 1
 -1.0 -16.0 0.00 0.0
February 2
 0.5 -5.5 0.00 0.0
February 3
 0.5 -13.0 0.00 0.0
February 4
 -13.0 -19.0 0.00 0.0
February 5
 -11.0 -21.0 0.05 0.5
February 6
 -4.0 -16.0 0.00 0.0
February 7
 8.0 -14.0 0.00 0.0
February 8
 0.5 -2.0 0.00 0.0
February 9
 -4.0 -10.5 0.00 0.0
February 10
 7.0 -8.5 0.00 0.0
February 11
 8.0 -5.0 0.50 0.0
February 12
 7.5 2.0 0.20 0.0
February 13
 -7.0 -11.0 0.00 0.0
February 14
 -4.0 -11.0 0.00 0.0
February 15
 -4.0 -9.0 0.00 n/a
February 16
 -4.0 -10.0 0.00 0.0
February 17
 1.0 -10.0 0.00 0.0
February 18
 7.0 -7.0 0.70 7.0
February 19
 2.5 -8.0 0.00 0.0
February 20
 -0.5 -12.5 0.35 3.5
February 21
 2.0 -9.0 0.30 3.0
February 22
 0.0 -6.0 0.20 2.0
February 23
 -8.0 -9.5 0.10 1.0
February 24
 -6.0 -13.0 0.00 0.0
February 25
 2.0 -11.0 0.00 0.0
February 26
 10.0 -6.0 0.00 0.0
February 27
 11.5 -0.5 0.00 0.0
February 28
 -10.5 -17.5 0.00 0.0
March 2009 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
March 1
 -6.0 -15.0 0.00 0.0
March 2
 -9.0 -13.0 0.00 0.0
March 3
 -8.0 -16.5 0.00 0.0
March 4
 -2.0 -12.0 0.00 0.0
March 5
 2.0 -13.0 0.00 0.0
March 6
 12.0 -2.0 0.00 0.0
March 7
 8.0 4.0 0.00 0.0
March 8
 6.0 2.0 0.00 0.0
March 9
 -1.0 -5.0 0.10 1.0
March 10
 2.5 -5.0 0.00 0.0
March 11
 11.5 1.0 0.10 0.0
March 12
 -5.0 -9.5 0.00 0.0
March 13
 -1.5 -11.5 0.00 0.0
March 14
 6.0 -6.0 0.00 0.0
March 15
 10.0 -1.5 0.00 0.0
March 16
 4.5 -3.0 0.00 0.0
March 17
 13.0 -3.5 0.00 0.0
March 18
 13.0 1.0 0.10 0.0
March 19
 5.0 0.0 0.00 0.0
March 20
 1.5 -9.0 0.00 0.0
March 21
 7.0 -8.5 0.10 1.0
March 22
 1.0 -4.0 0.00 0.0
March 23
 -2.5 -11.5 0.00 0.0
March 24
 4.0 -10.0 0.00 0.0
March 25
 8.5 -6.5 0.00 0.0
March 26
 5.5 0.0 0.00 0.0
March 27
 9.0 1.5 0.00 0.0
March 28
 14.0 0.0 0.00 0.0
March 29
 8.0 3.0 1.60 0.0
March 30
 6.0 1.5 0.36 0.0
March 31
 5.0 -1.0 0.00 0.0
April 2009 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
April 1
 8.5 0.5 0.23 0.0
April 2
 17.0 0.5 0.00 0.0
April 3
 17.0 3.0 1.52 0.0
April 4
 7.0 4.0 1.28 0.0
April 5
 8.0 1.0 0.00 0.0
April 6
 5.0 -2.0 1.70 0.0
April 7
 2.0 1.0 0.25 0.5
April 8
 4.0 -2.0 0.00 0.0
April 9
 9.0 1.0 0.00 0.0
April 10
 9.0 -3.0 0.00 0.0
April 11
 7.0 -2.0 0.00 0.0
April 12
 2.0 -3.0 0.00 0.0
April 13
 6.5 -3.0 0.00 0.0
April 14
 10.5 1.5 0.00 0.0
April 15
 12.0 3.0 0.00 0.0
April 16
 14.0 3.5 0.00 0.0
April 17
 19.5 3.0 0.30 0.0
April 18
 8.5 8.5 0.00 0.0
April 19
 10.5 -1.0 0.00 0.0
April 20
 16.0 2.5 1.00 0.0
April 21
 10.0 4.0 0.30 0.0
April 22
 13.0 6.0 0.00 0.0
April 23
 13.5 5.0 0.00 0.0
April 24
 24.5 3.0 0.00 0.0
April 25
 29.0 13.5 0.30 0.0
April 26
 12.0 7.5 0.00 0.0
April 27
 31.0 9.0 0.00 0.0
April 28
 21.0 9.0 1.00 0.0
April 29
 15.0 2.0 0.00 0.0
April 30
 22.0 2.0 1.20 0.0
May 2009 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
May 1
 21.0 11.0 0.30 0.0
May 2
 15.0 4.0 0.00 0.0
May 3
 19.0 7.0 0.00 0.0
May 4
 19.0 7.5 0.00 0.0
May 5
 20.0 6.5 0.00 0.0
May 6
 17.0 10.0 0.00 0.0
May 7
 12.5 11.5 0.44 0.0
May 8
 22.5 10.5 0.10 0.0
May 9
 16.0 12.5 2.90 0.0
May 10
 8.0 4.0 0.00 0.0
May 11
 15.5 3.0 0.00 0.0
May 12
 18.0 3.5 0.00 0.0
May 13
 23.0 5.0 0.00 0.0
May 14
 21.0 14.0 0.60 0.0
May 15
 19.0 9.0 0.00 0.0
May 16
 20.0 8.5 2.46 0.0
May 17
 11.0 5.5 0.00 0.0
May 18
 15.0 5.0 0.00 0.0
May 19
 20.0 4.0 0.00 0.0
May 20
 25.0 8.0 0.10 0.0
May 21
 29.0 13.5 0.00 0.0
May 22
 20.0 14.0 0.00 0.0
May 23
 22.0 11.0 0.00 0.0
May 24
 23.0 13.0 0.00 0.0
May 25
 14.0 8.5 0.00 0.0
May 26
 18.0 5.0 0.10 0.0
May 27
 14.0 8.5 1.54 0.0
May 28
 17.0 11.0 1.15 0.0
May 29
 21.0 14.0 0.10 0.0
May 30
 18.0 11.0 0.46 0.0
May 31
 14.0 10.0 0.26 0.0
June 2009 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
June 1
 15.5 4.5 0.30 0.0
June 2
 17.5 8.0 0.00 0.0
June 3
 21.5 8.0 0.00 0.0
June 4
 20.0 8.5 0.00 0.0
June 5
 24.0 7.0 0.00 0.0
June 6
 24.0 11.0 0.00 0.0
June 7
 18.5 10.0 0.00 0.0
June 8
 19.0 7.0 0.90 0.0
June 9
 17.5 11.0 0.40 0.0
June 10
 19.0 13.0 0.00 0.0
June 11
 23.5 11.5 0.10 0.0
June 12
 25.0 15.5 0.00 0.0
June 13
 25.0 13.5 0.00 0.0
June 14
 26.0 12.0 0.00 0.0
June 15
 22.5 14.0 0.00 0.0
June 16
 24.5 11.0 0.00 0.0
June 17
 26.0 15.0 0.60 0.0
June 18
 17.0 15.0 0.96 0.0
June 19
 19.0 15.0 0.00 0.0
June 20
 21.0 12.5 0.00 0.0
June 21
 26.0 18.0 0.00 0.0
June 22
 24.0 15.5 0.00 0.0
June 23
 28.0 13.5 0.00 0.0
June 24
 29.0 14.5 0.00 0.0
June 25
 32.5 19.0 0.00 0.0
June 26
 28.0 19.5 1.42 0.0
June 27
 24.0 17.0 0.30 0.0
June 28
 26.5 16.0 0.30 0.0
June 29
 25.0 17.0 0.00 0.0
June 30
 23.0 15.0 0.00 0.0
July 2009 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
July 1
 25.0 15.0 0.80 0.0
July 2
 24.0 16.0 1.10 0.0
July 3
 24.0 17.0 1.20 0.0
July 4
 18.5 17.0 0.00 0.0
July 5
 25.0 13.0 0.00 0.0
July 6
 22.5 14.0 0.40 0.0
July 7
 19.5 14.0 0.50 0.0
July 8
 22.0 14.0 0.00 0.0
July 9
 23.5 13.0 0.00 0.0
July 10
 27.0 13.5 0.00 0.0
July 11
 24.0 19.0 1.40 0.0
July 12
 22.5 13.5 0.58 0.0
July 13
 20.5 12.0 0.00 0.0
July 14
 19.5 12.5 0.00 0.0
July 15
 24.5 11.0 0.10 0.0
July 16
 28.0 15.5 0.20 0.0
July 17
 27.0 15.5 1.00 0.0
July 18
 25.0 17.0 0.46 0.0
July 19
 23.5 14.5 0.00 0.0
July 20
 25.0 15.0 0.00 0.0
July 21
 26.5 15.0 0.40 0.0
July 22
 23.0 17.0 0.00 0.0
July 23
 26.0 16.0 0.00 0.0
July 24
 26.0 19.0 2.05 0.0
July 25
 26.5 17.0 0.30 0.0
July 26
 26.5 19.0 0.00 0.0
July 27
 25.5 17.0 0.00 0.0
July 28
 30.0 17.0 0.40 0.0
July 29
 29.0 20.0 0.00 0.0
July 30
 26.0 18.0 0.14 0.0
July 31
 24.0 17.0 0.00 0.0
August 2009 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
August 1
 26.0 17.5 0.00 0.0
August 2
 25.0 19.0 2.50 0.0
August 3
 26.0 14.0 0.00 0.0
August 4
 30.0 19.0 2.24 0.0
August 5
 24.0 15.5 0.00 0.0
August 6
 24.0 15.0 0.00 0.0
August 7
 21.0 13.5 0.00 0.0
August 8
 23.5 10.5 0.00 0.0
August 9
 23.5 15.0 0.00 0.0
August 10
 30.0 20.0 0.00 0.0
August 11
 27.0 20.0 0.00 0.0
August 12
 28.0 17.0 0.00 0.0
August 13
 29.5 16.0 0.00 0.0
August 14
 31.0 18.0 0.00 0.0
August 15
 31.0 20.0 0.00 0.0
August 16
 31.5 19.5 0.00 0.0
August 17
 33.5 19.5 0.20 0.0
August 18
 30.0 22.0 0.26 0.0
August 19
 26.5 20.0 0.00 0.0
August 20
 25.0 15.5 2.08 0.0
August 21
 26.5 20.5 0.26 0.0
August 22
 28.5 19.0 0.00 0.0
August 23
 26.0 19.0 0.58 0.0
August 24
 25.5 17.5 0.00 0.0
August 25
 26.5 15.5 0.00 0.0
August 26
 23.5 19.5 0.00 0.0
August 27
 19.5 8.0 0.00 0.0
August 28
 20.0 8.0 0.10 0.0
August 29
 19.5 12.5 0.10 0.0
August 30
 22.5 15.0 0.00 0.0
August 31
 20.0 9.0 0.00 0.0
September 2009 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
September 1
 23.0 8.0 0.00 0.0
September 2
 25.0 12.5 0.00 0.0
September 3
 26.0 14.0 0.00 0.0
September 4
 26.5 13.0 0.00 0.0
September 5
 22.0 12.0 0.00 0.0
September 6
 21.0 8.0 0.00 0.0
September 7
 23.0 8.0 0.00 0.0
September 8
 26.5 12.0 0.00 0.0
September 9
 23.0 11.0 0.00 0.0
September 10
 24.0 8.5 0.00 0.0
September 11
 21.5 10.0 0.00 0.0
September 12
 24.0 10.0 0.00 0.0
September 13
 22.5 13.5 0.00 0.0
September 14
 23.5 9.5 0.40 0.0
September 15
 18.0 11.5 0.00 0.0
September 16
 19.0 8.5 0.00 0.0
September 17
 20.5 6.0 0.30 0.0
September 18
 18.0 12.0 0.00 0.0
September 19
 17.0 4.0 0.00 0.0
September 20
 21.5 6.5 0.00 0.0
September 21
 25.5 4.0 0.50 0.0
September 22
 24.0 15.0 0.77 0.0
September 23
 24.0 19.0 0.70 0.0
September 24
 20.0 10.0 0.00 0.0
September 25
 15.0 6.0 0.00 0.0
September 26
 21.0 2.0 1.10 0.0
September 27
 17.0 12.0 1.34 0.0
September 28
 19.0 13.5 0.30 0.0
September 29
 15.0 11.0 0.70 0.0
September 30
 9.0 5.0 0.00 0.0
October 2009 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
October 1
 7.5 4.0 0.00 0.0
October 2
 13.0 3.0 0.70 0.0
October 3
 17.0 9.0 0.00 0.0
October 4
 16.0 10.0 0.24 0.0
October 5
 15.5 10.0 0.24 0.0
October 6
 14.0 8.0 0.80 0.0
October 7
 15.5 9.5 0.14 0.0
October 8
 15.0 7.0 0.16 0.0
October 9
 12.0 9.5 0.85 0.0
October 10
 12.5 6.0 0.00 0.0
October 11
 10.5 3.5 0.00 0.0
October 12
 10.0 0.5 0.30 0.0
October 13
 7.5 3.0 0.30 0.0
October 14
 4.5 -1.5 0.00 0.0
October 15
 5.0 -2.0 0.00 0.0
October 16
 6.0 -4.0 0.00 0.0
October 17
 7.0 -4.0 0.00 0.0
October 18
 8.5 -2.5 0.00 0.0
October 19
 12.5 -3.5 0.00 0.0
October 20
 15.0 7.5 0.00 0.0
October 21
 10.0 8.0 0.72 0.0
October 22
 6.0 3.0 1.34 0.0
October 23
 7.5 0.0 2.30 0.0
October 24
 15.5 2.0 0.04 0.0
October 25
 12.0 9.0 0.00 0.0
October 26
 7.0 -1.0 0.00 0.0
October 27
 9.5 3.5 0.00 0.0
October 28
 7.0 3.5 0.54 0.0
October 29
 7.5 3.0 0.04 0.0
October 30
 15.0 5.5 0.26 0.0
October 31
 16.5 8.0 0.85 0.0
November 2009 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
November 1
 11.0 6.0 0.00 0.0
November 2
 11.5 0.0 0.10 0.0
November 3
 10.0 4.0 0.30 0.0
November 4
 5.0 -1.0 0.00 0.0
November 5
 6.5 -1.0 0.50 0.0
November 6
 2.0 0.0 0.00 0.0
November 7
 13.0 -5.0 0.00 0.0
November 8
 16.0 4.0 0.00 0.0
November 9
 20.5 1.5 0.00 0.0
November 10
 11.5 5.0 0.00 0.0
November 11
 8.0 -0.5 0.00 0.0
November 12
 7.0 -5.0 0.00 0.0
November 13
 10.5 -4.0 0.00 0.0
November 14
 8.0 -1.0 0.14 0.0
November 15
 17.0 5.0 0.00 0.0
November 16
 8.5 2.0 0.00 0.0
November 17
 5.5 -2.5 0.00 0.0
November 18
 10.0 -5.5 0.00 0.0
November 19
 12.0 -3.0 1.26 0.0
November 20
 9.5 4.0 0.52 0.0
November 21
 10.5 6.0 0.00 0.0
November 22
 6.5 4.5 0.00 0.0
November 23
 3.0 -2.5 0.00 0.0
November 24
 7.0 1.0 0.00 0.0
November 25
 9.0 3.0 0.59 0.0
November 26
 10.0 4.0 0.02 0.0
November 27
 7.0 2.5 0.30 0.0
November 28
 5.0 2.0 0.00 0.0
November 29
 6.0 4.0 0.20 2.0
November 30
 1.0 0.0 0.00 0.0
December 2009 Cornwall Weather
Day High (°C) Low (°C) Precip. (cm) Snow (cm)
December 1
 3.0 -2.0 0.00 0.0
December 2
 10.0 -1.0 2.45 0.0
December 3
 7.0 4.0 0.22 0.0
December 4
 4.0 0.5 0.00 0.0
December 5
 2.5 -1.0 0.00 0.0
December 6
 2.0 -4.0 0.00 0.0
December 7
 -0.5 -2.5 0.50 5.0
December 8
 -1.5 -5.0 0.00 0.0
December 9
 2.5 -7.5 0.95 9.5
December 10
 1.0 -1.5 0.00 0.0
December 11
 -5.0 -7.0 0.00 0.0
December 12
 -2.0 -9.0 0.00 0.0
December 13
 1.0 -7.0 1.30 13.0
December 14
 2.5 -3.0 0.10 1.0
December 15
 2.0 -3.0 0.30 3.0
December 16
 -6.0 -12.0 0.10 1.0
December 17
 -14.5 -19.5 0.00 0.0
December 18
 -10.0 -19.0 0.00 0.0
December 19
 -9.0 -20.5 0.00 0.0
December 20
 -8.0 -13.0 0.00 0.0
December 21
 -7.5 -13.0 0.00 0.0
December 22
 -12.0 -16.0 0.40 n/a
December 23
 -8.0 -12.0 0.50 5.0
December 24
 -1.0 -5.0 0.00 0.0
December 25
 -1.0 -3.0 0.00 0.0
December 26
 1.0 -3.5 2.72 0.0
December 27
 3.5 0.0 0.20 2.0
December 28
 0.0 -2.0 0.30 3.0
December 29
 -15.0 -18.0 0.00 0.0
December 30
 -5.0 -19.0 0.00 0.0
December 31
 -1.5 -7.0 0.50 5.0
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