Earliest and Latest Days at or Below 32° F in Sioux City

This is a list of the earliest and latest days in a winter season where the low temperature fell to at least 32 °F in Sioux City, Iowa history. It is based on NOAA data from the years 1948–2024.

Earliest freezing temperature in Sioux City?

The earliest in a winter season that Sioux City, Iowa has recorded a low temperature of 32 °F or below is September 15 which has happened twice, most recently in 2011.

Latest freezing temperature in Sioux City?

The latest in a winter season that Sioux City, Iowa has recorded a low temperature of 32 °F or below is May 22 which has happened twice, most recently in 2022.

Earliest Days ≤ 32 °F

Date	Year	Temperature
September 15	2011	32 °F
September 15	2007	32 °F
September 19	1991	29 °F
September 19	1971	32 °F
September 20	2006	32 °F
September 21	2000	30 °F
September 21	1999	29 °F
September 21	1997	32 °F
September 22	2012	32 °F
September 22	1995	25 °F
September 22	1974	32 °F
September 23	2012	25 °F
September 23	2011	29 °F
September 23	1989	30 °F
September 23	1983	31 °F
September 23	1971	32 °F
September 24	2001	30 °F
September 24	1965	31 °F
September 25	2003	32 °F
September 25	2001	31 °F
September 25	2000	31 °F
September 25	1995	32 °F
September 25	1975	31 °F

Latest Days ≤ 32 °F

Date	Year	Temperature
May 22	2022	30 °F
May 22	1963	31 °F
May 20	1997	32 °F
May 19	2002	32 °F
May 17	2014	30 °F
May 16	2014	28 °F
May 15	2014	32 °F
May 15	1983	32 °F
May 13	1997	25 °F
May 12	2013	29 °F
May 12	1969	31 °F
May 11	2021	31 °F
May 11	2020	29 °F
May 11	1981	32 °F
May 10	2002	30 °F
May 10	1981	32 °F
May 9	2020	31 °F
May 9	2010	30 °F
May 8	1980	29 °F
May 7	1989	31 °F
May 7	1976	30 °F
May 7	1954	30 °F