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Thunder Bay Weather in 2020

Historical record of Thunder Bay, Ontario weather for the year 2020 based on NOAA data.
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Year:
2020 Thunder Bay Weather Extremes
Highest temperature 34.1 °C July 2
Lowest temperature -33.4 °C February 14
Highest daily low 18.1 °C July 25
Lowest daily high -16.6 °C February 13
Most daily precipitation 4.5 cm September 6
Total annual precipitation 48.7 cm -
What was the hottest temperature in Thunder Bay in 2020?
The highest temperature recorded in Thunder Bay, Ontario in 2020 was 34.1 °C which happened on July 2.
Highest Temperatures: All-Time By Year
Highest Temperatures in Thunder Bay in 2020
Rank Temperature Date
1 34.1 °C Jul 2
2 32.2 °C Jul 4
3 31.9 °C Jul 3
4 31.2 °C Jul 25
5 31.0 °C Jul 26
6 30.3 °C Jun 2
7 30.2 °C Jun 27
8 29.9 °C Jul 15
9 29.6 °C Jul 7
10 29.5 °C Jun 25
What was the coldest temperature in Thunder Bay in 2020?
The lowest temperature recorded in Thunder Bay, Ontario in 2020 was -33.4 °C which happened on Feb 14.
Lowest Temperatures: All-Time By Year
Lowest Temperatures in Thunder Bay in 2020
Rank Temperature Date
1 -33.4 °C February 14
2 -31.1 °C February 13
3 -30.4 °C February 8
4 -29.9 °C December 29
5 -29.2 °C February 17
5 -29.2 °C February 7
7 -28.8 °C February 5
8 -27.9 °C January 17
9 -27.7 °C January 11
10 -27.0 °C February 16
January 2020 Thunder Bay Weather
Day High (°C) Low (°C) Precip. (cm)
January 1
 -3.1 -23.1 0.05
January 2
 0.4 -5.6 0.15
January 3
 -5.3 -8.1 0.00
January 4
 -3.1 -11.2 0.00
January 5
 -0.9 -8.2 0.35
January 6
 -3.3 -17.3 0.00
January 7
 -3.1 -18.1 0.00
January 8
 -14.3 -23.0 0.00
January 9
 -2.6 -14.5 0.55
January 10
 -3.4 -18.6 0.00
January 11
 -13.9 -27.7 0.00
January 12
 -10.5 -24.4 0.01
January 13
 -1.2 -11.7 0.00
January 14
 -1.0 -4.5 0.27
January 15
 -4.0 -10.3 0.14
January 16
 -10.2 -24.7 0.01
January 17
 -3.5 -27.9 0.02
January 18
 -2.1 -8.9 0.83
January 19
 -8.6 -17.1 0.00
January 20
 -7.5 -22.3 0.00
January 21
 -2.2 -23.0 0.00
January 22
 -3.1 -5.6 0.00
January 23
 -2.5 -7.7 0.01
January 24
 -0.6 -7.8 0.51
January 25
 1.1 -3.0 0.01
January 26
 -0.4 -4.5 0.01
January 27
 -4.5 -9.3 0.00
January 28
 -4.5 -13.7 0.00
January 29
 -5.6 -11.6 0.00
January 30
 -3.0 -8.4 0.00
January 31
 0.7 -5.7 0.00
February 2020 Thunder Bay Weather
Day High (°C) Low (°C) Precip. (cm)
February 1
 2.7 -1.6 0.04
February 2
 1.9 -6.8 0.10
February 3
 -1.7 -12.7 0.00
February 4
 -10.1 -23.9 0.00
February 5
 1.6 -28.8 0.00
February 6
 -2.6 -15.0 0.01
February 7
 -14.3 -29.2 0.01
February 8
 -6.9 -30.4 0.00
February 9
 -5.3 -20.1 0.00
February 10
 -1.1 -24.7 0.00
February 11
 -2.8 -9.0 0.00
February 12
 -5.5 -26.6 0.05
February 13
 -16.6 -31.1 0.00
February 14
 -5.3 -33.4 0.00
February 15
 -2.6 -15.2 0.28
February 16
 -11.6 -27.0 0.00
February 17
 -3.3 -29.2 0.19
February 18
 -5.6 -16.9 0.00
February 19
 -13.5 -22.6 0.00
February 20
 -4.7 -26.0 0.00
February 21
 4.8 -21.4 0.00
February 22
 9.1 -10.5 0.00
February 23
 6.3 -13.5 0.00
February 24
 4.4 -6.5 0.00
February 25
 -2.4 -14.2 0.00
February 26
 -8.1 -19.0 0.00
February 27
 -8.1 -17.1 0.00
February 28
 -5.1 -17.7 0.00
February 29
 0.8 -21.1 0.00
March 2020 Thunder Bay Weather
Day High (°C) Low (°C) Precip. (cm)
March 1
 5.1 -10.8 0.00
March 2
 2.0 -4.6 0.00
March 3
 1.8 -2.2 0.08
March 4
 0.9 -6.0 0.00
March 5
 -3.8 -12.6 0.23
March 6
 -3.1 -20.9 0.00
March 7
 8.3 -14.9 0.00
March 8
 2.4 -9.7 0.01
March 9
 -1.8 -14.3 0.00
March 10
 0.0 -17.7 0.00
March 11
 2.7 -14.9 0.00
March 12
 2.6 -1.0 0.35
March 13
 0.0 -8.2 0.00
March 14
 -0.8 -12.4 0.00
March 15
 -2.7 -16.0 0.07
March 16
 2.5 -5.3 0.17
March 17
 0.4 -9.1 0.00
March 18
 1.2 -13.9 0.00
March 19
 1.6 -5.5 0.83
March 20
 -4.4 -17.5 0.00
March 21
 -0.8 -21.4 0.00
March 22
 1.1 -18.0 0.09
March 23
 6.3 -6.1 0.00
March 24
 6.5 -9.1 0.00
March 25
 6.1 -4.5 0.01
March 26
 0.8 -8.0 0.00
March 27
 8.5 -10.0 0.00
March 28
 7.2 -5.7 0.00
March 29
 7.5 2.6 0.40
March 30
 n/a n/a n/a
March 31
 6.0 -6.9 0.00
April 2020 Thunder Bay Weather
Day High (°C) Low (°C) Precip. (cm)
April 1
 7.0 -3.5 0.00
April 2
 9.7 -6.3 0.00
April 3
 8.0 -3.3 0.47
April 4
 4.8 -5.6 0.00
April 5
 7.0 -8.8 0.00
April 6
 11.7 -2.9 0.00
April 7
 3.9 0.8 0.33
April 8
 9.5 -1.1 0.00
April 9
 5.3 -2.2 0.00
April 10
 7.0 -3.1 0.00
April 11
 11.4 -6.3 0.00
April 12
 4.3 -4.9 0.00
April 13
 0.9 -5.8 0.00
April 14
 1.5 -8.6 0.00
April 15
 3.1 -10.3 0.00
April 16
 4.7 -7.3 0.00
April 17
 8.3 -6.9 0.00
April 18
 14.2 -0.9 0.03
April 19
 5.6 -5.6 0.07
April 20
 9.6 -4.7 0.01
April 21
 2.3 -8.0 0.03
April 22
 3.7 -10.0 0.00
April 23
 6.2 -3.5 0.00
April 24
 12.1 -4.5 0.00
April 25
 13.1 -5.2 0.00
April 26
 11.2 -5.7 0.00
April 27
 7.1 -2.5 0.04
April 28
 7.8 -2.9 0.00
April 29
 16.6 6.2 0.01
April 30
 18.9 -0.3 0.00
May 2020 Thunder Bay Weather
Day High (°C) Low (°C) Precip. (cm)
May 1
 23.2 -2.9 0.09
May 2
 19.9 6.9 0.02
May 3
 9.3 1.6 0.00
May 4
 8.3 -4.1 0.00
May 5
 12.2 -6.1 0.00
May 6
 13.6 -4.1 0.00
May 7
 6.8 -4.0 0.00
May 8
 5.8 -7.2 0.00
May 9
 10.5 -6.6 0.00
May 10
 6.3 -2.7 0.00
May 11
 9.4 -8.4 0.00
May 12
 11.6 -7.9 0.01
May 13
 14.7 -7.6 0.08
May 14
 8.7 3.7 1.44
May 15
 18.6 1.5 0.40
May 16
 18.4 -0.3 0.00
May 17
 17.8 0.7 0.00
May 18
 18.4 2.4 0.00
May 19
 n/a n/a n/a
May 20
 22.1 1.4 0.00
May 21
 26.0 3.0 0.00
May 22
 24.9 4.6 0.00
May 23
 22.6 11.3 0.00
May 24
 25.5 9.7 0.00
May 25
 19.1 10.1 0.00
May 26
 20.1 12.1 0.61
May 27
 27.5 12.9 0.85
May 28
 n/a n/a n/a
May 29
 18.7 9.4 0.00
May 30
 15.0 2.8 0.00
May 31
 23.6 0.4 0.00
June 2020 Thunder Bay Weather
Day High (°C) Low (°C) Precip. (cm)
June 1
 19.2 3.5 0.05
June 2
 30.3 8.9 0.00
June 3
 25.5 7.4 0.00
June 4
 27.1 5.2 0.24
June 5
 25.2 8.7 0.14
June 6
 17.5 4.3 0.00
June 7
 8.9 3.2 0.97
June 8
 21.1 6.9 0.00
June 9
 18.3 14.0 0.00
June 10
 18.4 8.8 1.66
June 11
 9.1 3.2 0.10
June 12
 16.5 2.6 0.00
June 13
 17.8 0.0 0.00
June 14
 18.4 -1.4 0.00
June 15
 19.9 3.1 0.00
June 16
 29.3 12.0 0.00
June 17
 28.1 12.0 0.00
June 18
 26.4 10.8 0.00
June 19
 27.1 13.4 0.00
June 20
 21.5 11.1 0.03
June 21
 23.5 10.3 0.02
June 22
 24.0 7.6 0.00
June 23
 23.6 11.8 0.00
June 24
 25.4 9.0 0.00
June 25
 29.5 7.4 0.00
June 26
 29.1 9.9 0.32
June 27
 30.2 12.9 0.00
June 28
 27.8 10.6 0.00
June 29
 21.5 15.2 0.72
June 30
 24.9 16.2 0.45
July 2020 Thunder Bay Weather
Day High (°C) Low (°C) Precip. (cm)
July 1
 26.8 14.7 0.00
July 2
 34.1 15.7 0.00
July 3
 31.9 13.0 0.00
July 4
 32.2 15.3 0.03
July 5
 28.3 17.5 0.06
July 6
 29.1 14.1 0.59
July 7
 29.6 12.3 0.00
July 8
 23.3 12.0 0.00
July 9
 26.8 15.6 0.00
July 10
 29.1 15.1 0.00
July 11
 25.7 12.3 0.00
July 12
 26.6 11.1 0.00
July 13
 25.9 11.6 0.00
July 14
 23.1 13.5 1.03
July 15
 29.9 8.3 0.72
July 16
 25.8 12.2 1.32
July 17
 29.3 10.3 0.00
July 18
 26.7 15.5 0.55
July 19
 25.0 11.5 0.18
July 20
 22.4 10.8 0.00
July 21
 19.0 9.3 0.19
July 22
 23.3 10.6 0.25
July 23
 26.3 7.5 0.00
July 24
 25.8 8.9 0.00
July 25
 31.2 18.1 0.00
July 26
 31.0 17.2 0.14
July 27
 26.6 15.4 0.00
July 28
 24.7 13.6 0.22
July 29
 24.6 14.4 0.00
July 30
 28.3 12.2 0.00
July 31
 27.5 8.9 0.00
August 2020 Thunder Bay Weather
Day High (°C) Low (°C) Precip. (cm)
August 1
 24.7 10.7 1.28
August 2
 21.6 12.7 0.00
August 3
 19.7 7.0 0.00
August 4
 19.8 4.1 0.00
August 5
 26.4 5.4 0.00
August 6
 28.3 10.7 0.00
August 7
 26.5 10.5 0.06
August 8
 25.6 17.0 1.28
August 9
 24.6 15.7 1.07
August 10
 26.4 10.8 0.00
August 11
 29.3 8.5 0.00
August 12
 28.6 9.2 0.00
August 13
 26.2 11.7 0.00
August 14
 26.8 17.8 0.04
August 15
 25.6 13.5 0.01
August 16
 26.4 10.9 0.03
August 17
 23.1 9.7 0.00
August 18
 21.7 5.6 0.00
August 19
 20.1 10.2 3.81
August 20
 20.8 10.7 0.00
August 21
 24.4 11.6 0.00
August 22
 19.0 12.4 0.02
August 23
 22.8 14.5 0.00
August 24
 28.3 13.8 0.00
August 25
 21.5 12.3 0.02
August 26
 19.3 15.7 0.47
August 27
 25.4 11.8 0.00
August 28
 19.4 10.0 0.36
August 29
 19.7 7.6 0.00
August 30
 16.3 4.1 0.00
August 31
 16.6 8.0 0.92
September 2020 Thunder Bay Weather
Day High (°C) Low (°C) Precip. (cm)
September 1
 21.2 4.6 0.19
September 2
 20.6 9.6 0.01
September 3
 17.4 9.7 0.41
September 4
 18.5 7.9 0.00
September 5
 20.2 5.6 0.00
September 6
 18.5 5.5 4.49
September 7
 13.9 4.1 0.04
September 8
 13.3 1.2 0.00
September 9
 13.4 -0.3 0.00
September 10
 17.9 -2.1 0.00
September 11
 21.1 1.6 0.00
September 12
 15.1 7.8 0.18
September 13
 18.2 3.1 0.00
September 14
 n/a n/a n/a
September 15
 18.4 9.9 0.01
September 16
 16.5 2.3 0.00
September 17
 13.2 -1.6 0.00
September 18
 15.7 -4.4 0.00
September 19
 15.7 3.1 0.47
September 20
 19.0 1.9 0.00
September 21
 21.9 13.5 0.00
September 22
 25.5 6.5 0.00
September 23
 25.0 4.3 0.00
September 24
 13.8 5.1 0.00
September 25
 17.8 8.0 0.46
September 26
 17.2 10.5 0.08
September 27
 21.2 7.6 0.15
September 28
 12.9 8.2 0.00
September 29
 12.8 6.2 0.34
September 30
 13.4 5.8 0.20
October 2020 Thunder Bay Weather
Day High (°C) Low (°C) Precip. (cm)
October 1
 8.2 1.4 0.00
October 2
 5.3 2.0 0.00
October 3
 5.6 -2.2 0.00
October 4
 11.3 -4.8 0.00
October 5
 16.7 6.9 0.12
October 6
 15.7 4.0 0.04
October 7
 14.6 3.2 0.00
October 8
 14.4 -0.9 0.00
October 9
 19.4 5.5 0.05
October 10
 11.2 3.8 0.00
October 11
 12.5 3.9 0.00
October 12
 13.5 -1.0 2.25
October 13
 14.0 -2.2 0.00
October 14
 5.8 -2.6 2.34
October 15
 5.1 -1.9 0.00
October 16
 4.1 -5.1 0.03
October 17
 3.4 -6.9 0.42
October 18
 3.3 -5.6 0.12
October 19
 3.9 -7.6 0.00
October 20
 3.5 -9.0 0.60
October 21
 3.7 0.3 0.77
October 22
 4.4 -3.3 0.00
October 23
 3.0 -4.5 0.00
October 24
 3.5 -6.0 0.00
October 25
 1.7 -9.3 0.00
October 26
 0.7 -3.7 0.00
October 27
 2.2 -6.2 0.00
October 28
 3.3 -1.9 0.07
October 29
 -0.6 -11.8 0.00
October 30
 3.8 -13.5 0.00
October 31
 7.5 -8.1 0.01
November 2020 Thunder Bay Weather
Day High (°C) Low (°C) Precip. (cm)
November 1
 -0.5 -6.6 0.00
November 2
 12.0 -1.5 0.00
November 3
 11.7 -3.4 0.00
November 4
 14.4 -5.3 0.00
November 5
 16.6 -1.0 0.00
November 6
 20.7 -0.8 0.00
November 7
 6.7 -1.6 0.00
November 8
 18.9 5.1 0.00
November 9
 18.6 0.6 0.30
November 10
 0.7 -4.1 0.35
November 11
 0.5 -6.3 0.40
November 12
 1.8 -3.8 0.01
November 13
 -2.3 -10.0 0.00
November 14
 5.5 -12.5 0.09
November 15
 2.8 -2.5 0.58
November 16
 -2.4 -9.3 0.01
November 17
 -3.6 -14.4 0.00
November 18
 4.5 -15.3 0.00
November 19
 8.2 -0.7 0.00
November 20
 1.1 -9.4 0.04
November 21
 -0.8 -12.5 0.00
November 22
 2.7 -10.1 0.17
November 23
 -3.5 -12.7 0.00
November 24
 1.4 -7.9 0.12
November 25
 2.4 0.0 0.00
November 26
 3.0 -0.2 0.01
November 27
 1.7 -4.0 0.13
November 28
 6.9 -6.7 0.00
November 29
 1.7 -9.3 0.02
November 30
 -3.6 -15.1 0.00
December 2020 Thunder Bay Weather
Day High (°C) Low (°C) Precip. (cm)
December 1
 -1.9 -16.3 0.00
December 2
 0.9 -13.7 0.00
December 3
 3.6 -3.7 0.00
December 4
 -1.8 -13.1 0.00
December 5
 -3.4 -15.9 0.00
December 6
 -0.3 -4.6 0.00
December 7
 0.2 -3.0 0.00
December 8
 3.9 -3.3 0.00
December 9
 8.5 0.2 0.00
December 10
 2.3 -1.7 0.43
December 11
 0.1 -6.0 0.00
December 12
 -4.5 -14.8 0.00
December 13
 -8.0 -15.8 0.12
December 14
 -6.4 -19.2 0.01
December 15
 -10.8 -18.7 0.11
December 16
 -1.6 -12.5 0.06
December 17
 -0.1 -14.3 0.00
December 18
 0.6 -13.6 0.12
December 19
 0.2 -12.6 0.00
December 20
 -0.5 -13.8 0.00
December 21
 -6.8 -15.0 0.00
December 22
 1.0 -12.0 0.52
December 23
 1.3 -16.2 1.04
December 24
 -15.0 -19.4 0.03
December 25
 -10.4 -22.7 0.00
December 26
 -7.6 -11.2 0.02
December 27
 -8.5 -19.5 0.00
December 28
 -9.3 -19.8 0.00
December 29
 -9.6 -29.9 0.00
December 30
 -3.8 -9.8 0.47
December 31
 -1.9 -17.2 0.00
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Weather Station Details
Years Station Coordinates
2004–2024 Thunder Bay CS location
1941–2003 Thunder Bay A location
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