Highest Daily Low Temperatures in Sioux City History

This is a list of the hottest daily low temperatures ever recorded in Sioux City, Iowa history from 1948–2024 based on data from the NOAA.

Highest temperatures all-time

Record for the highest daily low temperature in Sioux City

The highest low temperature for a calendar day in Sioux City, Iowa history was 80 °F which has happened 4 times, most recently on Wednesday August 23, 2023.

Rank	Temperature	Date
1	80 °F	August 23, 2023
1	80 °F	July 15, 1969
1	80 °F	July 12, 1966
1	80 °F	August 2, 1964
5	79 °F	August 22, 2023
5	79 °F	July 23, 2016
5	79 °F	June 21, 2013
5	79 °F	July 20, 2011
5	79 °F	August 2, 1988
5	79 °F	July 14, 1980
5	79 °F	July 9, 1974
5	79 °F	July 2, 1974
5	79 °F	August 3, 1955
5	79 °F	July 29, 1955
15	78 °F	June 20, 2022
15	78 °F	June 29, 2018
15	78 °F	July 22, 2016
15	78 °F	July 21, 2016
15	78 °F	July 17, 2011
15	78 °F	July 25, 1997
15	78 °F	July 13, 1995
15	78 °F	August 17, 1988
15	78 °F	July 11, 1980
15	78 °F	June 27, 1971
15	78 °F	July 13, 1969
15	78 °F	July 11, 1966
15	78 °F	July 10, 1966
15	78 °F	July 9, 1966
15	78 °F	July 12, 1957
15	78 °F	July 30, 1955