Earliest and Latest Days of 90° F in Sioux City

This is a list of the earliest and latest days in the year with a high temperature of at least 90 °F in Sioux City, Iowa history. It is based on NOAA data from the years 1948–2024.

Also see:

Earliest 90 degree day in Sioux City?

The earliest in the year that Sioux City, Iowa had a high temperature of at least 90 °F is March 16 which happened in 2015.

Latest 90 degree day in Sioux City?

The latest in the year that Sioux City, Iowa had a high temperature of at least 90 °F is October 15 which happened in 1958.

Earliest Days ≥ 90 °F

Date	Year	Temperature
March 16	2015	90 °F
March 30	1968	91 °F
March 31	2012	90 °F
April 1	2012	93 °F
April 2	2012	92 °F
April 6	1991	91 °F
April 12	2023	92 °F
April 13	2023	90 °F
April 13	2006	91 °F
April 14	1954	90 °F
April 15	2002	96 °F
April 16	2004	90 °F
April 18	1994	92 °F
April 18	1985	91 °F
April 19	1987	90 °F
April 20	1989	90 °F
April 20	1980	91 °F
April 21	1980	94 °F
April 21	1962	90 °F
April 22	1980	97 °F
April 22	1960	94 °F

Latest Days ≥ 90 °F

Date	Year	Temperature
October 15	1958	90 °F
October 13	1975	92 °F
October 12	1995	91 °F
October 12	1975	92 °F
October 11	2015	91 °F
October 11	1956	90 °F
October 8	2010	93 °F
October 6	1997	91 °F
October 6	1963	91 °F
October 5	1963	93 °F
October 4	2011	90 °F
October 4	2005	91 °F
October 3	2018	92 °F
October 3	2006	93 °F
October 3	2005	91 °F
October 3	1997	91 °F
October 2	2005	90 °F
October 2	2001	90 °F
October 2	1997	94 °F
October 2	1953	93 °F