Highest Daily Low Temperatures in Flagstaff History

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

Highest temperatures all-time

Record for the highest daily low temperature in Flagstaff

The highest low temperature for a calendar day in Flagstaff, Arizona history was 72 °F which happened on Tuesday, July 13, 1897.

Rank	Temperature	Date
1	72 °F	July 13, 1897
2	70 °F	July 15, 1897
2	70 °F	July 14, 1897
4	68 °F	July 2, 2002
4	68 °F	July 16, 1897
6	67 °F	July 1, 2002
6	67 °F	July 17, 1897
8	66 °F	August 2, 1897
8	66 °F	July 31, 1897
8	66 °F	July 18, 1897
8	66 °F	July 12, 1897
8	66 °F	July 8, 1897
8	66 °F	July 7, 1897
14	65 °F	June 30, 1990
14	65 °F	July 13, 1935
14	65 °F	August 9, 1897
14	65 °F	July 6, 1897
18	64 °F	July 12, 2021
18	64 °F	July 10, 2021
18	64 °F	July 7, 1951
18	64 °F	August 31, 1897
18	64 °F	August 24, 1897
18	64 °F	August 20, 1897
18	64 °F	August 19, 1897
18	64 °F	August 18, 1897
18	64 °F	August 15, 1897
18	64 °F	August 8, 1897
18	64 °F	August 1, 1897
18	64 °F	July 30, 1897
18	64 °F	July 28, 1897
18	64 °F	July 19, 1897
18	64 °F	May 28, 1897
18	64 °F	May 23, 1897