Highest Daily Low Temperatures in Tucson History

This is a list of the hottest daily low temperatures ever recorded in Tucson, Arizona history from 1894–2024 based on data from the NOAA.

Highest temperatures all-time

Record for the highest daily low temperature in Tucson

The highest low temperature for a calendar day in Tucson, Arizona history was 89 °F which has happened twice, most recently on Monday July 13, 2020.

Rank	Temperature	Date
1	89 °F	July 13, 2020
1	89 °F	July 22, 2006
3	88 °F	July 12, 2022
4	87 °F	July 13, 2023
4	87 °F	July 22, 2022
4	87 °F	July 6, 2018
4	87 °F	June 25, 2017
4	87 °F	June 20, 2017
4	87 °F	July 9, 2010
4	87 °F	July 6, 2007
4	87 °F	July 5, 2007
4	87 °F	July 6, 1925
13	86 °F	July 15, 2023
13	86 °F	July 8, 2020
13	86 °F	July 12, 2019
13	86 °F	July 8, 2017
13	86 °F	June 22, 2017
13	86 °F	July 23, 2014
13	86 °F	July 13, 2005
13	86 °F	July 29, 1993
13	86 °F	June 27, 1990
13	86 °F	July 15, 1979
13	86 °F	July 19, 1978
13	86 °F	July 9, 1915
13	86 °F	July 26, 1899