Highest Daily Low Temperatures in Boulder History

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

Highest temperatures all-time

Record for the highest daily low temperature in Boulder

The highest low temperature for a calendar day in Boulder, Colorado history was 80 °F which happened on Thursday, June 24, 1954.

Rank	Temperature	Date
1	80 °F	June 24, 1954
2	77 °F	August 18, 1924
3	76 °F	July 11, 1954
3	76 °F	July 5, 1922
3	76 °F	July 26, 1919
3	76 °F	August 6, 1918
3	76 °F	August 25, 1912
3	76 °F	August 21, 1903
9	75 °F	August 4, 1954
9	75 °F	July 12, 1954
9	75 °F	July 10, 1954
9	75 °F	September 3, 1947
9	75 °F	July 23, 1919
9	75 °F	July 22, 1919
9	75 °F	July 1, 1919
9	75 °F	July 8, 1912
17	74 °F	June 19, 2012
17	74 °F	July 19, 1994
17	74 °F	July 26, 1966
17	74 °F	August 10, 1964
17	74 °F	June 23, 1954
17	74 °F	July 16, 1922
17	74 °F	August 14, 1919
17	74 °F	July 24, 1919
17	74 °F	July 19, 1919