Earliest and Latest Snowfalls in Cornwall History

This is a list of the earliest and latest times in the year when snow was recorded in Cornwall, Ontario. It is based on NOAA data from the years 1867–2024.

What's the Earliest it has Snowed in Cornwall?

The earliest in the season it has snowed in Cornwall, Ontario is October 2 which happened in 1974.

What's the Latest it has Snowed in Cornwall?

The latest in the season it has snowed in Cornwall, Ontario is May 12 which happened in 1996.

Earliest Snowfalls

Date	Year	Snowfall
October 2	1974	5.1 cm
October 9	1979	4.0 cm
October 14	1872	1.0 cm
October 17	1976	0.8 cm
October 21	1997	1.0 cm
October 21	1969	2.5 cm
October 22	1997	1.0 cm
October 22	1988	14.4 cm
October 23	1997	3.6 cm
October 24	1880	2.5 cm
October 25	1976	0.8 cm
October 25	1877	5.1 cm
October 26	1881	0.5 cm
October 27	1965	0.8 cm
October 28	2008	5.0 cm
October 28	1878	0.5 cm
October 29	2000	0.4 cm
October 29	1992	4.0 cm
October 29	1873	2.0 cm
October 30	1966	0.3 cm
October 30	1887	2.0 cm

Latest Snowfalls

Date	Year	Snowfall
May 12	1996	1.0 cm
May 11	1885	0.3 cm
May 10	1963	8.9 cm
May 7	1967	2.5 cm
May 3	1882	0.5 cm
April 29	1885	12.7 cm
April 29	1884	1.3 cm
April 28	2002	10.5 cm
April 26	1976	0.3 cm
April 24	1996	1.6 cm
April 24	1872	4.6 cm
April 23	2003	1.0 cm
April 23	1996	1.8 cm
April 23	1993	2.0 cm
April 23	1868	11.4 cm
April 22	2012	3.0 cm
April 22	2003	1.8 cm
April 22	2002	1.0 cm
April 22	1993	35.1 cm
April 22	1882	2.3 cm