Lowest Daily High Temperatures in Helena History

This is a list of the coldest daily high temperatures ever recorded in Helena, Montana history from 1893–2024 based on data from the NOAA.

Lowest temperatures all-time

Record for the lowest daily high temperature in Helena

The lowest high temperature for a calendar day in Helena, Montana history was -33 °F which happened on Tuesday, January 31, 1893.

Rank	Temperature	Date
1	-33 °F	January 31, 1893
2	-24 °F	February 7, 1936
2	-24 °F	December 16, 1924
4	-23 °F	February 2, 1989
4	-23 °F	January 28, 1916
6	-22 °F	December 24, 1983
7	-21 °F	January 18, 1935
8	-20 °F	January 26, 1957
8	-20 °F	January 7, 1937
10	-19 °F	December 22, 2022
10	-19 °F	February 3, 1989
10	-19 °F	December 8, 1972
10	-19 °F	December 29, 1968
10	-19 °F	December 31, 1927
10	-19 °F	January 8, 1909
10	-19 °F	January 7, 1909
10	-19 °F	February 5, 1893
18	-18 °F	January 13, 2024
18	-18 °F	December 20, 1990
18	-18 °F	February 1, 1989
18	-18 °F	January 24, 1969
18	-18 °F	February 15, 1936
18	-18 °F	January 20, 1935
18	-18 °F	January 19, 1935
18	-18 °F	January 28, 1929
18	-18 °F	January 29, 1916
18	-18 °F	February 11, 1905