Thunder Bay Record Low by Day of the Year

Data for the record low temperature for each day of the year in Thunder Bay, Ontario, as well as the year that the record was set. It is based on NOAA data for the years 1941–2024.

Also see:

Day	Record Low	Year Set or Tied
January 1	-37.5	2014
January 2	-39.0	2014
January 3	-35.7	2014
January 4	-33.3	1942, 1959
January 5	-34.5	2004
January 6	-34.6	2004
January 7	-37.2	1968
January 8	-38.3	1968
January 9	-37.9	1977
January 10	-36.7	1982
January 11	-36.5	1989
January 12	-36.5	1999
January 13	-34.4	1957
January 14	-37.8	1965
January 15	-37.2	1972
January 16	-39.0	1979
January 17	-40.4	1982
January 18	-38.3	1948
January 19	-38.3	1963
January 20	-35.6	1943
January 21	-37.5	2013
January 22	-39.5	2013
January 23	-37.6	1996
January 24	-37.2	1948
January 25	-38.3	1957
January 26	-37.3	1996
January 27	-38.9	1950
January 28	-37.2	1951
January 29	-40.0	1951
January 30	-41.1	1951
January 31	-43.2	1996
February 1	-40.6	1996
February 2	-37.6	1996
February 3	-40.0	1970
February 4	-40.4	1996
February 5	-35.1	1982
February 6	-35.2	1982
February 7	-35.6	1962
February 8	-36.7	1962
February 9	-38.9	1951
February 10	-34.7	2021
February 11	-33.3	2001
February 12	-39.4	1967
February 13	-36.7	1951
February 14	-33.9	1951
February 15	-37.4	2015
February 16	-35.0	1979
February 17	-38.6	1979
February 18	-35.6	1967
February 19	-32.8	1966
February 20	-33.4	2015
February 21	-31.9	1986
February 22	-32.2	1953
February 23	-32.0	2003
February 24	-36.0	2022
February 25	-34.5	2022
February 26	-32.7	2015
February 27	-34.6	2014
February 28	-32.0	2014
March 1	-31.7	1962
March 2	-36.7	1943
March 3	-33.4	2003
March 4	-33.1	1996
March 5	-33.7	2015
March 6	-33.2	1996
March 7	-34.7	1996
March 8	-33.9	1943
March 9	-29.8	1995
March 10	-31.1	1950
March 11	-28.9	1969
March 12	-30.5	2009
March 13	-27.2	1976
March 14	-26.1	1950
March 15	-29.4	1950
March 16	-28.3	2014
March 17	-29.4	1976
March 18	-29.4	1944
March 19	-28.3	1944
March 20	-28.9	1965
March 21	-24.4	1965
March 22	-26.7	1974
March 23	-25.6	1951
March 24	-30.0	1965
March 25	-27.2	1974
March 26	-26.8	2014
March 27	-23.3	1965
March 28	-22.8	1955, 1970
March 29	-26.7	1954
March 30	-22.2	1975
March 31	-24.4	1975
April 1	-17.2	1975
April 2	-21.1	1954
April 3	-21.1	1954
April 4	-22.2	1954
April 5	-20.5	1982
April 6	-17.7	1982
April 7	-19.4	1982
April 8	-21.1	1950
April 9	-17.3	1979
April 10	-13.1	2007
April 11	-10.6	1952
April 12	-15.6	1950
April 13	-12.9	1992
April 14	-15.6	1950
April 15	-13.3	1950
April 16	-14.1	2014
April 17	-18.4	1983
April 18	-16.4	1983
April 19	-12.7	1983
April 20	-12.7	2013
April 21	-16.4	2013
April 22	-10.0	2020
April 23	-9.4	2002
April 24	-10.0	1949
April 25	-9.0	2021
April 26	-7.6	2003
April 27	-9.5	2004
April 28	-9.4	1956
April 29	-10.6	1958
April 30	-7.2	2003
May 1	-6.7	1945
May 2	-8.9	1958
May 3	-8.3	1967
May 4	-8.9	1954
May 5	-7.8	1954
May 6	-6.7	1954
May 7	-7.8	1954
May 8	-7.2	2020
May 9	-7.2	1947, 1966
May 10	-6.7	1966
May 11	-8.4	2020
May 12	-7.9	2020
May 13	-7.6	2020
May 14	-5.6	1945
May 15	-7.2	1942
May 16	-6.7	1957
May 17	-5.9	1983
May 18	-6.3	2002
May 19	-4.9	2002
May 20	-5.6	2002
May 21	-4.9	2002
May 22	-4.4	2015
May 23	-3.9	1956, 1963
May 24	-5.6	1956
May 25	-4.4	1956, 1969
May 26	-3.0	1997, 2011
May 27	-3.7	2011
May 28	-4.6	2021
May 29	-3.6	2021
May 30	-3.7	1996
May 31	-3.5	2009
June 1	-1.7	1971
June 2	-1.6	2019
June 3	-2.4	2019
June 4	-2.2	1951
June 5	-1.7	1945
June 6	-1.2	2009
June 7	-2.8	1949
June 8	-2.8	1949
June 9	-1.6	1978
June 10	-1.4	1980
June 11	-1.1	1958
June 12	0.0	1947
June 13	-1.1	1946
June 14	-1.4	2020
June 15	0.6	1948
June 16	1.1	1972, 1999
June 17	0.6	1950, 1972
June 18	1.1	1948, 1950
June 19	1.5	2003
June 20	0.3	2003
June 21	-1.1	1950
June 22	1.0	1978
June 23	0.1	1979, 1996
June 24	0.9	1979
June 25	1.2	2018
June 26	0.9	2014
June 27	2.0	1992
June 28	0.5	2003
June 29	2.5	1989
June 30	2.2	1959
July 1	2.8	1969
July 2	2.9	2013
July 3	2.8	1972
July 4	4.1	1983
July 5	2.2	1967
July 6	0.0	1969
July 7	3.9	2000, 2021
July 8	1.6	2021
July 9	2.8	1942
July 10	1.7	1968
July 11	2.8	1945
July 12	4.3	1994
July 13	4.1	1994
July 14	3.4	1987, 2009
July 15	4.4	1942, 1945
July 16	2.8	1945
July 17	4.5	1979
July 18	2.8	1956
July 19	4.2	2000
July 20	4.4	1944, 1950
July 21	3.9	1947
July 22	5.3	1992
July 23	5.0	1962
July 24	2.8	1953, 2004
July 25	5.6	1946
July 26	3.4	2001
July 27	1.1	2001
July 28	6.1	1955, 1971
July 29	3.3	1952
July 30	4.3	1978
July 31	3.9	1971
August 1	2.8	1947
August 2	4.4	1959, 1965
August 3	3.8	2018
August 4	2.8	1942, 1951
August 5	4.3	2004
August 6	4.4	2002
August 7	4.4	1972
August 8	5.0	1964, 1994
August 9	2.8	1962
August 10	2.2	1951
August 11	2.1	1997
August 12	2.8	2004
August 13	3.3	1946, 1964
August 14	2.2	1997
August 15	2.2	1976
August 16	3.7	1979
August 17	3.7	2007
August 18	0.4	2007
August 19	1.9	1997
August 20	0.6	1950
August 21	1.6	2004
August 22	0.0	1950
August 23	1.6	2004
August 24	0.0	1942
August 25	0.4	1977
August 26	-0.6	1950
August 27	1.1	1957
August 28	1.7	1968, 1976
August 29	-1.1	1976
August 30	0.0	1976
August 31	1.7	1974, 2006
September 1	-1.1	1949, 1976
September 2	-2.2	1976
September 3	-2.2	1946
September 4	-1.1	1946
September 5	-1.1	1972
September 6	-0.4	2011
September 7	-1.7	1951, 1952
September 8	-1.7	1946
September 9	-3.3	1956
September 10	-2.2	1967
September 11	-1.1	1965
September 12	-2.2	1943, 1946
September 13	-2.2	1963, 1975
September 14	-1.1	1963, 1964, 1970
September 15	-4.4	2007
September 16	-4.2	2011
September 17	-3.6	2011
September 18	-4.4	2020
September 19	-4.4	1993
September 20	-5.0	1956
September 21	-5.0	1956
September 22	-4.4	1947, 1995
September 23	-6.8	1995
September 24	-4.0	2000
September 25	-8.3	1942
September 26	-4.4	1965
September 27	-5.6	1947, 1957, 1965
September 28	-8.3	1942
September 29	-8.3	1945
September 30	-6.1	1947
October 1	-6.0	2009
October 2	-8.1	2003
October 3	-7.8	1945
October 4	-6.4	1999
October 5	-7.2	1958
October 6	-8.5	1999
October 7	-7.3	2012
October 8	-8.3	1989
October 9	-7.8	1989
October 10	-7.2	1964
October 11	-6.9	1987
October 12	-8.7	2012
October 13	-7.3	2002
October 14	-8.8	1978
October 15	-7.3	1993
October 16	-8.4	2002
October 17	-12.2	1952
October 18	-9.4	2002
October 19	-10.6	1972
October 20	-11.1	1952
October 21	-8.3	1969
October 22	-10.0	1969
October 23	-12.8	1969
October 24	-10.0	1972
October 25	-10.1	1981
October 26	-13.3	1981
October 27	-13.1	1997
October 28	-13.3	1942
October 29	-11.8	2020
October 30	-13.5	2020
October 31	-13.2	1984
November 1	-12.2	1951, 1966
November 2	-18.9	1951
November 3	-21.7	1951
November 4	-18.3	1951
November 5	-18.9	1951
November 6	-18.9	1951
November 7	-17.8	1991
November 8	-21.0	1991
November 9	-17.1	2003
November 10	-18.9	1957
November 11	-19.0	1995, 2019
November 12	-22.2	1966
November 13	-23.5	1995
November 14	-22.2	1943
November 15	-19.4	1943
November 16	-19.4	1943
November 17	-22.8	1956
November 18	-20.0	1965
November 19	-22.2	1966
November 20	-22.2	1978
November 21	-23.9	1969
November 22	-21.8	1978
November 23	-25.0	1995
November 24	-27.9	1995
November 25	-28.5	1985
November 26	-22.8	1975
November 27	-23.7	2014
November 28	-26.1	1958
November 29	-29.0	1985
November 30	-30.6	1976
December 1	-32.5	1978
December 2	-31.6	1991
December 3	-32.2	1964
December 4	-31.7	1964
December 5	-28.6	1991
December 6	-28.9	1972
December 7	-29.0	1978
December 8	-35.0	1976
December 9	-34.4	1976
December 10	-33.0	2013
December 11	-37.3	1977
December 12	-31.2	1995
December 13	-37.8	1976
December 14	-31.7	1943
December 15	-29.1	2013
December 16	-33.9	2008
December 17	-27.6	1983
December 18	-33.3	1956
December 19	-33.3	1955, 1983
December 20	-33.3	1942
December 21	-31.1	1970
December 22	-28.2	2000
December 23	-32.4	1990
December 24	-33.4	2004
December 25	-34.9	2004
December 26	-33.4	1993
December 27	-32.8	1964
December 28	-31.0	1978
December 29	-31.7	1989
December 30	-36.7	2013
December 31	-39.6	2013

Years with the Most Daily Records

Which years set the greatest number of daily low temperature records in Thunder Bay history?

Rank	Year	Records Set
1	1951	17
2	1950	15
3	1976	12
4	1996	11
5	2014	10
6	2004	10
7	1965	10
8	1956	10
9	1942	10
10	2020	9

Daily Records by Decade

This table shows the number of daily low temperature records in Thunder Bay that were set in each decade since 1941.

Decade	Records Set
1940s	51
1950s	74
1960s	49
1970s	56
1980s	28
1990s	42
2000s	46
2010s	36
2020s	17

Weather Station Details

Years	Station	Coordinates
2004–2024	Thunder Bay CS	location
1941–2003	Thunder Bay A	location