Frost history / Sunnyside #2, WA
Sunnyside #2, WA: frost dates by year
Last spring and first fall frost at NOAA station USC00458211, 2013 to 2025, measured from daily minimum temperatures.
Elevation 805 ft, 46.345, -120.029. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 28 | Oct 15 |
| Earliest | Apr 7 (2016) | Oct 1 (2019) |
| Latest | May 13 (2022) | Nov 3 (2022) |
| Trend | 3.8 days later per decade | 6.7 days later per decade |
| Years with data | 11 | 13 |
At 28°F (hard freeze) the median last spring date is Apr 13 and the median first fall date is Nov 3.
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 | Apr 14 | Oct 15 | Mar 19 | Nov 19 |
| 2024 | May 8 | Oct 19 | Mar 15 | Oct 30 |
| 2023 | Apr 21 | Oct 28 | Apr 6 | Oct 28 |
| 2022 | May 13 | Nov 3 | Apr 17 | Nov 3 |
| 2021 | Apr 13 | Oct 12 | Apr 13 | Nov 17 |
| 2020 | May 7 | Oct 23 | May 4 | Oct 23 |
| 2019 | May 3 | Oct 1 | Apr 16 | Oct 1 |
| 2018 | Apr 24 | Oct 3 | Apr 4 | Nov 7 |
| 2017 | Apr 29 | Oct 9 | Apr 15 | Oct 14 |
| 2016 | Apr 7 | Oct 12 | Mar 29 | Nov 17 |
| 2015 | no data | Oct 27 | no data | Nov 4 |
| 2014 | Apr 28 | Oct 27 | Apr 14 | Nov 8 |
| 2013 | no data | Oct 4 | no data | Oct 15 |
"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.