Highest Daily Low Temperatures in Helena History

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

Highest temperatures all-time

Record for the highest daily low temperature in Helena

The highest low temperature for a calendar day in Helena, Montana history was 74 °F which happened on Thursday, July 23, 1936.

Rank	Temperature	Date
1	74 °F	July 23, 1936
2	73 °F	July 16, 1935
2	73 °F	July 23, 1901
4	72 °F	July 28, 2021
4	72 °F	August 1, 1900
6	71 °F	July 24, 2007
6	71 °F	July 26, 1933
6	71 °F	July 21, 1893
9	70 °F	July 19, 2007
9	70 °F	July 25, 1931
9	70 °F	July 17, 1925
9	70 °F	August 19, 1919
9	70 °F	July 22, 1919
9	70 °F	July 9, 1896
15	69 °F	July 29, 2021
15	69 °F	July 10, 2001
15	69 °F	July 8, 2001
15	69 °F	July 11, 1985
15	69 °F	July 31, 1936
15	69 °F	June 22, 1900
15	69 °F	July 24, 1894