Frost history / Mayfield Pwr Plt, WA
Mayfield Pwr Plt, WA: frost dates by year
Last spring and first fall frost at NOAA station USC00455110, 2011 to 2025, measured from daily minimum temperatures.
Elevation 280 ft, 46.504, -122.594. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 13 | Nov 9 |
| Earliest | Mar 14 (2025) | Oct 10 (2019) |
| Latest | May 11 (2012) | Dec 6 (2016) |
| Trend | 13.3 days earlier per decade | 10.4 days later per decade |
| Years with data | 15 | 15 |
At 28°F (hard freeze) the median last spring date is Mar 5 and the median first fall date is Nov 21.
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 14 | Nov 30 | Feb 13 | Dec 28 |
| 2024 | May 4 | Nov 30 | Mar 7 | Dec 4 |
| 2023 | Apr 21 | Oct 28 | Feb 26 | Oct 30 |
| 2022 | Apr 16 | Nov 9 | Feb 26 | Nov 16 |
| 2021 | Apr 13 | Nov 22 | Mar 17 | Dec 27 |
| 2020 | Apr 3 | Oct 25 | Mar 17 | Dec 4 |
| 2019 | Mar 29 | Oct 10 | Mar 12 | Oct 31 |
| 2018 | Apr 4 | Nov 9 | Mar 6 | Dec 4 |
| 2017 | Apr 4 | Nov 7 | Feb 26 | Dec 7 |
| 2016 | Mar 30 | Dec 6 | Feb 24 | Dec 7 |
| 2015 | Apr 16 | Nov 4 | Mar 5 | Nov 21 |
| 2014 | Mar 25 | Nov 12 | Feb 10 | Nov 14 |
| 2013 | May 2 | Oct 30 | Mar 24 | Nov 21 |
| 2012 | May 11 | Nov 9 | Mar 9 | Nov 11 |
| 2011 | May 4 | Oct 26 | Feb 27 | Nov 20 |
"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.