Earliest and Latest Snowfalls in Boise History

This is a list of the earliest and latest times in the year when snow was recorded in Boise, Idaho. It is based on NOAA data from the years 1911–2024.

What's the Earliest it has Snowed in Boise?

The earliest in the season it has snowed in Boise, Idaho is October 10 which happened in 2008.

What's the Latest it has Snowed in Boise?

The latest in the season it has snowed in Boise, Idaho is May 12 which happened in 1970.

Earliest Snowfalls

Date	Year	Snowfall
October 10	2008	1.7 inches
October 12	1969	1.2 inches
October 13	1966	0.1 inches
October 21	1935	0.1 inches
October 26	1970	0.3 inches
October 27	1971	1.0 inches
October 28	1919	0.5 inches
October 29	2019	0.4 inches
October 29	1991	1.1 inches
October 29	1919	3.0 inches
October 30	1971	0.7 inches
October 30	1946	0.6 inches
October 30	1935	1.1 inches
October 31	1971	1.0 inches
October 31	1919	1.0 inches
November 1	1991	0.8 inches
November 1	1971	0.4 inches
November 1	1956	1.2 inches
November 1	1955	0.2 inches
November 1	1935	4.2 inches
November 1	1919	0.5 inches

Latest Snowfalls

Date	Year	Snowfall
May 12	1970	0.5 inches
May 9	2022	0.5 inches
May 8	1983	0.8 inches
May 3	1975	0.9 inches
May 2	1964	4.0 inches
May 1	1915	0.2 inches
April 30	1954	0.2 inches
April 30	1915	3.5 inches
April 29	1972	0.2 inches
April 28	1970	0.1 inches
April 28	1967	0.8 inches
April 26	1966	0.1 inches
April 25	1967	1.0 inches
April 24	1984	0.3 inches
April 21	1968	0.3 inches
April 20	1963	0.2 inches
April 20	1920	0.1 inches
April 19	1985	1.0 inches
April 19	1967	6.0 inches
April 19	1955	1.2 inches