Earliest and Latest Snowfalls in Castle Rock History

This is a list of the earliest and latest times in the year when snow was recorded in Castle Rock, Colorado. It is based on NOAA data from the years 1893–2024.

What's the Earliest it has Snowed in Castle Rock?

The earliest in the season it has snowed in Castle Rock, Colorado is September 8 which happened in 2001.

What's the Latest it has Snowed in Castle Rock?

The latest in the season it has snowed in Castle Rock, Colorado is May 30 which happened in 1975.

Earliest Snowfalls

Date	Year	Snowfall
September 8	2001	1.0 inches
September 9	2020	1.0 inches
September 10	1898	2.0 inches
September 11	1898	2.0 inches
September 12	1989	0.1 inches
September 13	1993	2.0 inches
September 17	1971	10.5 inches
September 18	1971	1.0 inches
September 21	1995	2.8 inches
September 21	1965	4.0 inches
September 21	1895	3.5 inches
September 24	2000	2.5 inches
September 26	1996	1.0 inches
September 26	1964	1.0 inches
September 26	1908	3.0 inches
September 27	1996	3.0 inches
September 30	1965	1.0 inches
October 5	1969	18.0 inches
October 6	1921	1.0 inches
October 7	1992	1.0 inches
October 7	1990	2.5 inches

Latest Snowfalls

Date	Year	Snowfall
May 30	1975	2.0 inches
May 29	1975	2.0 inches
May 27	1967	2.0 inches
May 26	1989	2.0 inches
May 21	2019	4.0 inches
May 20	1988	1.0 inches
May 19	2017	1.9 inches
May 18	2017	2.1 inches
May 17	1983	5.0 inches
May 15	1896	5.0 inches
May 14	1967	4.0 inches
May 13	2014	1.0 inches
May 13	1983	0.5 inches
May 13	1975	1.0 inches
May 12	2014	5.5 inches
May 12	2011	3.5 inches
May 12	2010	1.0 inches
May 12	1896	3.0 inches
May 11	2006	1.0 inches
May 11	1929	4.0 inches