Frost history / Ellensburg Bowers Fld, WA
Ellensburg Bowers Fld, WA: frost dates by year
Last spring and first fall frost at NOAA station USW00024220, 1951 to 2024, measured from daily minimum temperatures.
Elevation 1,766 ft, 47.034, -120.530. Download the data (JSON) · NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 3 | Oct 3 |
| Earliest | Mar 26 (2016) | Sep 19 (1957) |
| Latest | Jun 18 (1954) | Oct 29 (2022) |
| Trend | 2.1 days earlier per decade | 1.4 days later per decade |
| Years with data | 35 | 35 |
At 28°F (hard freeze) the median last spring date is Apr 20 and the median first fall date is Oct 17.
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 | May 3 | Sep 30 | Mar 15 | Oct 23 |
| 2023 | Apr 20 | Sep 30 | Apr 20 | Oct 27 |
| 2022 | Apr 24 | Oct 29 | Apr 20 | Nov 2 |
| 2021 | Apr 21 | Oct 7 | Apr 12 | Oct 12 |
| 2020 | May 4 | Oct 21 | Apr 17 | Oct 22 |
| 2019 | May 1 | Sep 30 | Mar 20 | Oct 9 |
| 2018 | Apr 24 | Oct 3 | Apr 2 | Nov 7 |
| 2017 | Apr 29 | Oct 4 | Apr 11 | Oct 14 |
| 2016 | Mar 26 | Oct 12 | Mar 18 | Nov 17 |
| 2015 | Apr 26 | Sep 27 | Apr 26 | Nov 4 |
| 2014 | Apr 28 | Oct 27 | Apr 19 | Nov 11 |
| 2013 | May 1 | Oct 4 | May 1 | Oct 15 |
| 2012 | May 11 | Oct 3 | Apr 13 | Oct 5 |
| 2011 | May 4 | Oct 17 | Apr 23 | Oct 26 |
| 2010 | May 9 | Oct 13 | Apr 10 | Oct 16 |
| 2009 | May 1 | Oct 6 | Apr 6 | Oct 10 |
| 2008 | May 2 | Sep 23 | Apr 26 | Oct 11 |
| 2007 | May 14 | Oct 17 | Apr 20 | Oct 26 |
| 2006 | May 13 | Oct 10 | Mar 21 | Oct 22 |
| 2005 | Apr 15 | Oct 4 | Apr 13 | Oct 27 |
| 2004 | Apr 19 | Oct 24 | Apr 19 | Oct 25 |
| 2003 | May 19 | Oct 12 | May 19 | Oct 25 |
| 2002 | May 16 | Sep 21 | May 8 | Oct 12 |
| 2001 | May 7 | Sep 29 | May 6 | Oct 5 |
| 2000 | May 10 | Sep 22 | May 7 | Sep 23 |
| 1999 | May 26 | Sep 27 | May 10 | Sep 28 |
| 1998 | no data | Oct 3 | no data | Oct 16 |
| 1959 | May 12 | no data | May 6 | no data |
| 1958 | May 13 | Sep 24 | Apr 18 | Oct 21 |
| 1957 | Apr 20 | Sep 19 | Apr 16 | Oct 15 |
| 1956 | Apr 30 | Sep 22 | Apr 20 | Oct 19 |
| 1955 | May 14 | Sep 22 | Apr 30 | Oct 6 |
| 1954 | Jun 18 | Sep 29 | May 1 | Oct 2 |
| 1953 | May 22 | Sep 29 | Apr 15 | Oct 22 |
| 1952 | May 5 | Oct 14 | May 5 | Oct 15 |
| 1951 | Apr 27 | Oct 17 | Apr 24 | Oct 17 |
"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 1991–2020 frost probabilities.