Frost history / Everett Snohomish Ap, WA
Everett Snohomish Ap, WA: frost dates by year
Last spring and first fall frost at NOAA station USW00024222, 1951 to 2024, measured from daily minimum temperatures.
Elevation 606 ft, 47.908, -122.280. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Mar 10 | Nov 11 |
| Earliest | Feb 21 (2004) | Oct 25 (2020) |
| Latest | Apr 18 (2008) | Dec 23 (1999) |
| Trend | 1.1 days earlier per decade | 0.5 days later per decade |
| Years with data | 27 | 26 |
At 28°F (hard freeze) the median last spring date is Feb 9 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 |
|---|---|---|---|---|
| 2024 | Mar 6 | Dec 4 | Jan 16 | none |
| 2023 | Mar 16 | Oct 28 | Feb 25 | none |
| 2022 | Mar 10 | Nov 9 | Feb 25 | Nov 28 |
| 2021 | Mar 16 | Nov 17 | Feb 13 | Dec 26 |
| 2020 | Mar 18 | Oct 25 | Jan 14 | none |
| 2019 | Mar 10 | Oct 29 | Feb 11 | Nov 29 |
| 2018 | Mar 10 | no data | Feb 23 | no data |
| 2017 | Feb 28 | Nov 3 | Jan 15 | Dec 23 |
| 2016 | Feb 23 | Dec 5 | Jan 3 | Dec 7 |
| 2015 | Mar 4 | Nov 20 | Jan 1 | Nov 28 |
| 2014 | Mar 1 | Nov 12 | Feb 8 | Nov 13 |
| 2013 | Mar 23 | Nov 20 | Jan 22 | Nov 21 |
| 2012 | Mar 8 | Nov 10 | Jan 19 | none |
| 2011 | Feb 27 | Nov 6 | Feb 26 | Nov 20 |
| 2010 | Apr 10 | Nov 21 | none | Nov 22 |
| 2009 | Mar 21 | Dec 2 | Mar 11 | Dec 5 |
| 2008 | Apr 18 | Dec 13 | Jan 25 | Dec 14 |
| 2007 | Apr 2 | Nov 21 | Mar 1 | Dec 8 |
| 2006 | Mar 19 | Oct 29 | Feb 19 | Nov 27 |
| 2005 | Feb 26 | Nov 27 | Feb 19 | Dec 11 |
| 2004 | Feb 21 | Nov 5 | Jan 6 | none |
| 2003 | Mar 8 | Nov 1 | Feb 12 | Nov 3 |
| 2002 | Mar 20 | Oct 30 | Mar 7 | none |
| 2001 | Mar 4 | Dec 3 | Feb 7 | none |
| 2000 | Mar 20 | Nov 10 | Jan 19 | Nov 16 |
| 1999 | Mar 7 | Dec 23 | Jan 24 | Dec 28 |
| 1951 | Mar 18 | Oct 31 | Mar 11 | Nov 24 |
"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.