Earliest and Latest Snowfalls in Waterloo History

This is a list of the earliest and latest times in the year when snow was recorded in Waterloo, Iowa. It is based on NOAA data from the years 1895–2024.

What's the Earliest it has Snowed in Waterloo?

The earliest in the season it has snowed in Waterloo, Iowa is October 14 which happened in 2018.

What's the Latest it has Snowed in Waterloo?

The latest in the season it has snowed in Waterloo, Iowa is May 29 which happened in 1947.

Earliest Snowfalls

Date	Year	Snowfall
October 14	2018	0.1 inches
October 18	1991	1.2 inches
October 18	1972	0.3 inches
October 19	1976	0.1 inches
October 20	1982	1.2 inches
October 21	1916	0.5 inches
October 22	2013	1.0 inches
October 24	2002	0.5 inches
October 24	1962	0.3 inches
October 24	1938	1.2 inches
October 25	2020	0.1 inches
October 26	1997	4.1 inches
October 27	2002	0.1 inches
October 28	2019	1.4 inches
October 28	2002	0.7 inches
October 29	2019	0.2 inches
October 30	1930	0.6 inches
October 30	1917	0.2 inches
October 31	2019	0.5 inches
October 31	1989	0.4 inches
October 31	1939	0.1 inches

Latest Snowfalls

Date	Year	Snowfall
May 29	1947	2.0 inches
May 11	1966	0.3 inches
May 4	1935	0.5 inches
May 3	2013	0.5 inches
May 2	2013	1.2 inches
May 1	1909	0.8 inches
April 30	1997	0.4 inches
April 27	2019	0.7 inches
April 26	1967	0.4 inches
April 24	1910	0.5 inches
April 23	1991	0.7 inches
April 22	1984	1.3 inches
April 22	1918	1.0 inches
April 20	1993	3.0 inches
April 20	1978	0.4 inches
April 20	1959	0.3 inches
April 19	2011	0.8 inches
April 18	2018	4.0 inches
April 17	1961	0.5 inches
April 17	1960	3.0 inches
April 17	1921	0.1 inches
April 17	1910	0.5 inches