Frost history / Cushman Powerhouse #2, WA
Cushman Powerhouse #2, WA: frost dates by year
Last spring and first fall frost at NOAA station USC00451939, 1973 to 2025, measured from daily minimum temperatures.
Elevation 21 ft, 47.371, -123.160. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 7 | Nov 9 |
| Earliest | Jan 4 (2016) | Oct 4 (2009) |
| Latest | May 7 (1985) | Dec 5 (2016) |
| Trend | 6.3 days earlier per decade | 1.2 days later per decade |
| Years with data | 47 | 48 |
At 28°F (hard freeze) the median last spring date is Feb 19 and the median first fall date is Nov 28.
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 | Mar 18 | Nov 30 | Feb 13 | none |
| 2024 | Mar 13 | Nov 19 | Jan 17 | none |
| 2023 | Apr 6 | Oct 28 | Mar 2 | none |
| 2022 | Apr 17 | Nov 9 | Mar 11 | Nov 19 |
| 2021 | Apr 13 | Nov 22 | Feb 14 | Dec 26 |
| 2020 | Apr 5 | Oct 26 | none | none |
| 2019 | Mar 14 | Oct 10 | Mar 9 | Nov 29 |
| 2018 | Apr 3 | Nov 19 | Feb 24 | Dec 6 |
| 2017 | Mar 20 | Nov 4 | Jan 16 | Dec 21 |
| 2016 | Jan 4 | Dec 5 | Jan 3 | Dec 16 |
| 2015 | Mar 5 | Nov 25 | Jan 2 | Nov 27 |
| 2014 | Mar 23 | Nov 12 | Feb 9 | Nov 14 |
| 2013 | Apr 14 | Nov 20 | Jan 17 | Nov 21 |
| 2012 | Apr 7 | Nov 9 | Mar 19 | none |
| 2011 | Apr 18 | Nov 2 | Feb 27 | Nov 20 |
| 2010 | Mar 20 | Nov 21 | Mar 9 | Nov 23 |
| 2009 | Apr 4 | Oct 4 | Mar 13 | Dec 5 |
| 2008 | Apr 21 | Nov 24 | Mar 31 | Dec 15 |
| 2007 | Apr 19 | Nov 21 | Feb 2 | Dec 27 |
| 2006 | Mar 24 | Oct 30 | Feb 20 | Oct 31 |
| 2005 | Apr 13 | Nov 27 | Feb 21 | Dec 14 |
| 2004 | Apr 1 | Nov 28 | Jan 5 | none |
| 2000 | Apr 23 | no data | Feb 18 | no data |
| 1999 | no data | Nov 4 | no data | none |
| 1998 | Mar 28 | no data | Jan 11 | no data |
| 1997 | no data | Dec 2 | no data | none |
| 1996 | Mar 27 | Oct 15 | Mar 1 | Nov 22 |
| 1995 | Mar 25 | Oct 30 | Mar 2 | Dec 5 |
| 1994 | Mar 25 | Nov 3 | Feb 9 | Nov 17 |
| 1993 | Mar 29 | Nov 10 | Feb 28 | Nov 23 |
| 1992 | Apr 6 | Nov 23 | Jan 7 | Dec 3 |
| 1991 | Apr 29 | Oct 21 | Jan 30 | Oct 21 |
| 1990 | Mar 26 | Nov 20 | Feb 19 | Dec 19 |
| 1989 | Mar 28 | Nov 28 | Mar 4 | none |
| 1988 | May 1 | Nov 14 | Feb 2 | Dec 15 |
| 1987 | Apr 19 | Nov 17 | Feb 25 | Dec 17 |
| 1986 | Apr 29 | Oct 28 | Feb 20 | none |
| 1985 | May 7 | Oct 29 | Mar 29 | Nov 11 |
| 1984 | Apr 26 | Oct 17 | Jan 20 | Dec 3 |
| 1983 | Apr 25 | Nov 29 | Feb 4 | Dec 1 |
| 1982 | May 4 | Nov 8 | Feb 10 | Nov 10 |
| 1981 | Apr 13 | Nov 5 | Feb 11 | Nov 28 |
| 1980 | Apr 11 | Nov 13 | Mar 30 | Dec 6 |
| 1979 | Apr 10 | Nov 9 | Feb 15 | Dec 11 |
| 1978 | Apr 6 | Nov 9 | Jan 2 | Nov 10 |
| 1977 | Apr 20 | Nov 3 | Jan 27 | Nov 17 |
| 1976 | Apr 25 | Oct 20 | Mar 6 | Nov 26 |
| 1975 | Apr 29 | Nov 9 | Apr 1 | Nov 28 |
| 1974 | Apr 13 | Nov 22 | Mar 8 | Dec 23 |
| 1973 | no data | Nov 3 | no data | Nov 3 |
"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.