Clearbrook, WA: frost dates by year

Last spring and first fall frost at NOAA station USC00451484, 1951 to 2025, measured from daily minimum temperatures.

Elevation 64 ft, 48.967, -122.329. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 22	Oct 15
Earliest	Mar 7 (2017)	Sep 13 (1970)
Latest	May 31 (1953)	Dec 2 (2024)
Trend	4.6 days earlier per decade	2.7 days later per decade
Years with data	74	74

At 28°F (hard freeze) the median last spring date is Mar 15 and the median first fall date is Nov 8.

The trend is a straight-line fit through the years with a freeze. A positive spring trend means the last frost now comes later. Short or patchy records give noisy trends.

Chart

Last spring frost (32°F)

First fall frost (32°F)

Dots are single years. The gray line is the median, the green line the fitted trend.

Year by year

Year	Last spring 32°F	First fall 32°F	Last spring 28°F	First fall 28°F
2025	Apr 23	Nov 30	Mar 6	Dec 27
2024	Apr 10	Dec 2	Mar 7	Dec 2
2023	Apr 21	Oct 26	Apr 15	Oct 28
2022	Apr 16	Oct 23	Apr 15	Nov 3
2021	Apr 12	Oct 12	Mar 16	Dec 17
2020	Apr 14	Oct 22	Mar 22	Oct 26
2019	Mar 17	Oct 10	Mar 12	Oct 30
2018	Apr 2	Oct 6	Mar 25	Nov 19
2017	Mar 7	Oct 31	Feb 28	Nov 6
2016	Mar 17	Dec 1	Jan 15	Dec 7
2015	Apr 15	Nov 4	Mar 4	Nov 10
2014	Mar 22	Nov 12	Mar 2	Nov 15
2013	May 1	Oct 13	Mar 9	Nov 4
2012	Apr 7	Nov 9	Mar 7	Nov 10
2011	Apr 15	Oct 15	Mar 7	Nov 4
2010	May 5	Oct 17	Mar 9	Nov 21
2009	Apr 24	Oct 8	Mar 26	Dec 4
2008	Apr 26	Oct 9	Apr 3	Dec 13
2007	Apr 20	Oct 27	Mar 2	Nov 2
2006	May 10	Oct 8	Mar 13	Oct 31
2005	Mar 14	Oct 4	Feb 27	Nov 21
2004	Apr 1	Oct 27	Feb 22	Nov 20
2003	Apr 26	Nov 1	Mar 9	Nov 1
2002	May 10	Oct 1	Apr 3	Oct 24
2001	Apr 14	Oct 28	Apr 2	Dec 12
2000	Apr 7	Nov 11	Mar 6	Nov 12
1999	May 10	Oct 4	Apr 2	Dec 22
1998	Apr 2	Oct 19	Mar 7	Dec 18
1997	Apr 7	Oct 19	Mar 14	Dec 25
1996	May 9	Oct 20	Mar 25	Nov 17
1995	Apr 19	Oct 22	Mar 7	Nov 2
1994	May 2	Oct 16	Feb 25	Nov 3
1993	Mar 28	Sep 22	Feb 28	Nov 7
1992	Apr 21	Sep 16	Feb 7	Dec 4
1991	no data	Oct 28	no data	Oct 28
1990	Apr 7	no data	Mar 26	no data
1989	Mar 23	Oct 3	Mar 4	Oct 29
1988	Mar 28	Nov 14	Mar 12	Dec 16
1987	Apr 25	Oct 12	Feb 28	Oct 18
1986	May 16	Oct 12	Feb 21	Nov 9
1985	May 9	Sep 29	Apr 21	Nov 11
1984	Apr 27	Oct 15	Feb 17	Oct 16
1983	Apr 16	Sep 29	Jan 1	Dec 1
1982	May 5	Oct 18	Apr 8	Nov 10
1981	Apr 13	Oct 11	Feb 13	Nov 6
1980	Mar 30	Oct 14	Mar 8	Nov 15
1979	Apr 14	Nov 8	Feb 16	Nov 9
1978	May 5	Oct 26	Mar 15	Oct 26
1977	Apr 20	Oct 3	Mar 16	Nov 18
1976	Apr 5	Oct 15	Mar 6	Oct 19
1975	May 7	Nov 18	Apr 29	Nov 18
1974	May 3	Sep 29	Mar 23	Oct 5
1973	May 1	Oct 3	Apr 29	Nov 1
1972	Apr 30	Sep 25	Apr 17	Sep 27
1971	Apr 18	Sep 30	Mar 25	Oct 17
1970	May 18	Sep 13	Apr 28	Oct 26
1969	Apr 15	Oct 11	Mar 13	Oct 13
1968	May 2	Sep 21	Apr 21	Nov 4
1967	Apr 24	Nov 3	Apr 15	Nov 21
1966	May 28	Oct 9	Mar 24	Oct 13
1965	May 8	Sep 28	Apr 11	Dec 12
1964	May 25	Oct 21	Apr 18	Nov 13
1963	May 9	Oct 19	Apr 13	Nov 20
1962	May 7	Oct 16	Mar 28	Nov 28
1961	Apr 20	Sep 21	Apr 20	Oct 29
1960	May 15	Sep 30	Apr 10	Nov 5
1959	May 5	Oct 16	Feb 12	Nov 7
1958	May 13	Oct 27	Mar 14	Nov 16
1957	Apr 21	Sep 19	Mar 25	Oct 15
1956	May 13	Oct 28	Apr 30	Nov 19
1955	May 23	Oct 31	Apr 25	Nov 11
1954	May 1	Oct 2	Apr 23	Oct 24
1953	May 31	Oct 22	Apr 11	Oct 23
1952	May 5	Oct 15	Apr 9	Nov 7
1951	Apr 21	Oct 22	Apr 21	Oct 31

"none" means the station recorded no freeze at that threshold in that half of the year. "no data" means more than 10% of the season's daily readings were missing. Years with no usable data are left out. See the methodology for the rules, and the ZIP lookup for 1991 to 2020 frost probabilities.