Frost history / Seattle Sand Pt Wsfo, WA
Seattle Sand Pt Wsfo, WA: frost dates by year
Last spring and first fall frost at NOAA station USW00094290, 1987 to 2024, measured from daily minimum temperatures.
Elevation 60 ft, 47.687, -122.255. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Mar 8 | Nov 22 |
| Earliest | Jan 15 (2016) | Oct 28 (2023) |
| Latest | Apr 11 (1991) | Dec 26 (2021) |
| Trend | 2.2 days later per decade | 4.2 days earlier per decade |
| Years with data | 33 | 35 |
At 28°F (hard freeze) the median last spring date is Feb 8 and the median first fall date is Dec 5.
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 |
|---|---|---|---|---|
| 2024 | Mar 7 | Dec 3 | Jan 16 | none |
| 2023 | no data | Oct 28 | no data | Nov 28 |
| 2022 | Mar 10 | Nov 9 | Feb 25 | Nov 28 |
| 2021 | Mar 30 | Dec 26 | Feb 13 | Dec 26 |
| 2020 | Mar 18 | Nov 8 | none | none |
| 2019 | Mar 11 | Nov 29 | Feb 10 | none |
| 2018 | Mar 4 | Nov 20 | Feb 23 | Dec 7 |
| 2017 | Feb 27 | Nov 3 | Jan 15 | Dec 8 |
| 2016 | Jan 15 | Dec 6 | none | Dec 7 |
| 2015 | Mar 4 | Nov 23 | none | Nov 28 |
| 2014 | Mar 22 | Nov 12 | Feb 7 | Nov 29 |
| 2013 | Mar 24 | Nov 20 | Jan 13 | Dec 4 |
| 2012 | Mar 7 | Nov 9 | Jan 19 | none |
| 2011 | Mar 4 | Nov 6 | Feb 26 | none |
| 2010 | Mar 9 | Nov 22 | none | Nov 22 |
| 2009 | Apr 4 | Dec 3 | Mar 11 | Dec 6 |
| 2008 | Apr 3 | Dec 13 | Jan 26 | Dec 14 |
| 2007 | Mar 21 | Nov 22 | Feb 3 | Dec 8 |
| 2006 | Mar 19 | Oct 30 | Mar 12 | Nov 27 |
| 2005 | Feb 24 | Nov 28 | Feb 19 | Dec 16 |
| 2004 | Feb 13 | Nov 29 | Jan 6 | none |
| 2003 | Feb 26 | Nov 1 | Feb 24 | Nov 3 |
| 2002 | Mar 8 | Oct 30 | Mar 1 | Nov 2 |
| 2001 | Mar 22 | Dec 23 | Feb 28 | none |
| 2000 | Mar 20 | Nov 11 | Jan 30 | Nov 17 |
| 1999 | no data | Dec 24 | no data | none |
| 1997 | Feb 28 | no data | Feb 8 | no data |
| 1996 | Mar 25 | no data | Mar 1 | no data |
| 1995 | Mar 3 | Dec 5 | Feb 15 | Dec 6 |
| 1994 | Feb 9 | Nov 18 | Feb 8 | Nov 22 |
| 1993 | Feb 28 | Nov 22 | Feb 27 | Nov 22 |
| 1992 | Jan 20 | Nov 25 | Jan 19 | Dec 3 |
| 1991 | Apr 11 | Oct 30 | Jan 31 | Dec 15 |
| 1990 | no data | Dec 18 | no data | Dec 18 |
| 1989 | no data | Dec 11 | no data | none |
| 1988 | Mar 11 | Dec 15 | Feb 2 | Dec 25 |
| 1987 | Feb 25 | Dec 13 | Jan 15 | Dec 25 |
"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.