Frost history / Tolt S Fk Rsvr, WA
Tolt S Fk Rsvr, WA: frost dates by year
Last spring and first fall frost at NOAA station USC00458508, 2011 to 2025, measured from daily minimum temperatures.
Elevation 2,000 ft, 47.700, -121.691. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 15 | Nov 4 |
| Earliest | Mar 18 (2019) | Oct 1 (2024) |
| Latest | May 25 (2022) | Nov 24 (2025) |
| Trend | 0.5 days earlier per decade | 6.1 days earlier 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 29.
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 19 | Nov 24 | Feb 14 | none |
| 2024 | May 22 | Oct 1 | Mar 7 | none |
| 2023 | Apr 19 | Oct 27 | Feb 27 | none |
| 2022 | May 25 | Nov 5 | Feb 25 | Nov 29 |
| 2021 | Apr 12 | Nov 7 | Feb 15 | Dec 26 |
| 2020 | Apr 13 | Oct 25 | Mar 16 | Nov 8 |
| 2019 | Mar 18 | Oct 9 | Mar 12 | Nov 29 |
| 2018 | Apr 12 | Nov 8 | Mar 25 | Dec 31 |
| 2017 | May 17 | Nov 3 | Feb 28 | Dec 21 |
| 2016 | Mar 30 | Nov 16 | Jan 3 | Dec 6 |
| 2015 | Apr 15 | Nov 4 | Jan 2 | Nov 25 |
| 2014 | Apr 22 | Nov 12 | Mar 21 | Nov 12 |
| 2013 | May 1 | Oct 29 | Mar 24 | Nov 20 |
| 2012 | Apr 8 | Nov 9 | Mar 23 | Dec 16 |
| 2011 | May 2 | Nov 1 | Mar 5 | Nov 19 |
"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.