Continuous Periods of Temperature under -40°

YearsDates
JanuaryFebruaryMarchNovemberDecember
189411 to 123 to 75 to 1514 to 158 to 10
14 to 1511 to 1917 to 1917 to 18
27 to 2923 to 2425 to 2630 to 1[1]
189514 to 189 to 1019 to 2320 to 237 to 8
23 to 2613 to 1626 to 28
18 to 22
189629[2] to 184 to 94 to 5
11 to 20