Toronto Public Health calls extreme cold weather alerts. Here are the total days and dates for winter seasons going back to 2004-5.
Total days: 49
November 12
January 3, 4, 7, 8, 9, 10, 11 12, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
February 3, 4, 5 6, 12, 13, 14, 15, 17, 18, 19, 20, 25, 26, 27, 28
March 1, 2, 3, 4, 12, 13, 14
Total days: 14
January 28, 29, 30, 31
February 1, 7, 8, 11, 12, 13, 16, 17
March 1, 2
Total days: 30
November 12, 13, 15, 16
December 18, 19, 20
January 8, 9, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30
February 7, 8, 9, 13, 14, 15
Total days: 27
November 21
January 10, 12, 16, 17, 18, 19, 20, 21, 25, 26, 27, 28, 29, 30, 31
February 1, 8, 11, 12, 18, 25, 27
March 3, 4, 5, 6, 7
Total days: 31
November 9
December 12, 13, 14, 16, 25, 26, 27, 28, 29, 30, 31
January 1, 2, 3, 4, 5, 6, 7, 12, 13, 14, 29
February 1, 2, 3, 4, 5, 7, 8, 12
Total days: 22
December 14, 15, 16, 18, 19
January 5, 6, 7, 8
February 2, 3, 8, 9
March 3, 4, 10, 11, 12, 13, 14, 15, 21
Total days: 12
January 3, 4, 17, 18
February 11, 12, 13, 14, 17, 25
March 2
April 4
Total days: 39
January 7, 9, 10, 12, 13, 14, 16, 20, 25, 27, 30
February 1, 2, 3, 4, 5, 8, 9, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27
March 2, 4, 5, 22, 27
Total days: 36
December 16, 24
January 1, 2, 3, 6, 7, 8, 20, 21, 22, 23, 25, 26, 27, 28, 29, 30
February 5, 6, 7, 8, 9, 10, 11, 16, 24, 25, 26, 27
March 2, 3, 12, 13, 15, 16
Total days: 9
January 21, 22, 23, 24
February 7, 8, 16
April 10, 11
Total days: 7
January 2, 3, 13, 14
February 10, 11
March 4
Total days: 10
December 8, 13
January 15, 16, 21, 22, 23, 30
February 9, 10
Total days: 7
December 28
January 2, 8, 9, 28, 29, 30
Total days: 27
December 7, 19, 20, 21, 22, 31
January 3, 10, 13, 14, 15, 16, 19, 20, 23, 24, 25, 26, 30
February 3, 4, 23, 27, 28
March 1, 2, 3
Total days: 13
November 22
December 16
January 1, 2, 19, 30
February 10, 11, 20, 27, 28
March 8, 22
Total days: 18
January 15, 16, 24, 25, 28
February 3, 4, 5, 6, 7, 12, 13, 14, 15, 18, 23
March 5, 6
Total days: 9
December 11, 12
January 15
February 17, 18, 19, 25, 26, 27
Total days: 23
December 19, 20, 26
January 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28
February 23, 24, 26
March 2, 3, 8, 9, 13