Frost history / Tok #2, AK
Tok #2, AK: frost dates by year
Last spring and first fall frost at NOAA station USC00509314, 2012 to 2025, measured from daily minimum temperatures.
Elevation 1,658 ft, 63.316, -143.006. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 21 | Aug 17 |
| Earliest | Jun 1 (2016) | Aug 4 (2012) |
| Latest | Jul 29 (2022) | Sep 3 (2023) |
| Trend | 7.3 days later per decade | 9.4 days later per decade |
| Years with data | 14 | 13 |
At 28°F (hard freeze) the median last spring date is May 30 and the median first fall date is Aug 22.
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 | Jun 26 | Aug 12 | May 28 | Aug 12 |
| 2024 | Jul 28 | Aug 14 | May 31 | Aug 14 |
| 2023 | Jun 15 | Sep 3 | May 27 | Sep 13 |
| 2022 | Jul 29 | Aug 10 | May 28 | Sep 4 |
| 2021 | Jun 2 | Aug 19 | May 25 | Aug 22 |
| 2020 | Jul 2 | Aug 17 | May 21 | Sep 4 |
| 2019 | Jun 5 | Aug 19 | May 14 | Aug 19 |
| 2018 | Jul 18 | Aug 18 | Jun 14 | Aug 19 |
| 2017 | Jun 15 | Aug 18 | Jun 15 | Sep 2 |
| 2016 | Jun 1 | Aug 17 | May 30 | Aug 30 |
| 2015 | Jun 14 | Aug 8 | Jun 13 | Aug 12 |
| 2014 | Jul 21 | Aug 6 | Jun 7 | Aug 28 |
| 2013 | Jun 13 | no data | Jun 13 | no data |
| 2012 | Jul 9 | Aug 4 | Jun 2 | Aug 22 |
"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.