Earliest and Latest Snowfalls in Sioux City History

This is a list of the earliest and latest times in the year when snow was recorded in Sioux City, Iowa. It is based on NOAA data from the years 1948–2024.

What's the Earliest it has Snowed in Sioux City?

The earliest in the season it has snowed in Sioux City, Iowa is September 30 which happened in 1961.

What's the Latest it has Snowed in Sioux City?

The latest in the season it has snowed in Sioux City, Iowa is May 1 which happened in 2013.

Earliest Snowfalls

Date	Year	Snowfall
September 30	1961	0.4 inches
October 8	1959	0.3 inches
October 9	1970	5.1 inches
October 10	2009	1.0 inches
October 12	2009	0.8 inches
October 14	2018	0.1 inches
October 14	1966	3.7 inches
October 15	1966	0.3 inches
October 16	2002	1.5 inches
October 17	1990	0.4 inches
October 18	2006	0.3 inches
October 18	1976	0.2 inches
October 18	1972	0.2 inches
October 19	1982	8.0 inches
October 22	2002	0.6 inches
October 22	1979	0.1 inches
October 22	1951	0.2 inches
October 23	2002	2.5 inches
October 24	1981	2.0 inches
October 24	1962	1.5 inches

Latest Snowfalls

Date	Year	Snowfall
May 1	2013	1.4 inches
April 29	1984	5.0 inches
April 29	1956	1.2 inches
April 28	1994	2.1 inches
April 26	1988	2.3 inches
April 25	2008	0.3 inches
April 25	1965	1.0 inches
April 23	2001	0.2 inches
April 23	1968	0.2 inches
April 22	2023	0.2 inches
April 22	2013	1.5 inches
April 21	2021	0.2 inches
April 21	1992	0.5 inches
April 20	1992	4.5 inches
April 20	1959	2.9 inches
April 19	2021	0.3 inches
April 19	1959	0.8 inches
April 18	2018	2.5 inches
April 18	2013	4.7 inches
April 17	1999	0.1 inches
April 17	1983	0.5 inches
April 17	1961	0.1 inches