Frost history / Soldotna 5SSW, AK
Soldotna 5SSW, AK: frost dates by year
Last spring and first fall frost at NOAA station USC00508615, 2005 to 2024, measured from daily minimum temperatures.
Elevation 180 ft, 60.419, -151.134. Download the data (JSON) · NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 14 | Aug 25 |
| Earliest | May 16 (2016) | Aug 3 (2009) |
| Latest | Jul 27 (2022) | Sep 24 (2022) |
| Trend | 9.3 days earlier per decade | 16.5 days later per decade |
| Years with data | 19 | 17 |
At 28°F (hard freeze) the median last spring date is May 29 and the median first fall date is Sep 19.
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 | Jun 7 | no data | May 15 | no data |
| 2023 | May 22 | Sep 8 | May 22 | Sep 25 |
| 2022 | Jul 27 | Sep 24 | May 31 | Oct 10 |
| 2021 | Jun 14 | Aug 21 | Jun 2 | Sep 19 |
| 2020 | Jun 13 | Aug 28 | May 27 | Sep 11 |
| 2019 | Jun 10 | no data | May 22 | no data |
| 2018 | Jul 12 | Aug 28 | May 29 | Sep 9 |
| 2017 | Jun 24 | Aug 27 | Jun 18 | Sep 30 |
| 2016 | May 16 | Sep 1 | May 10 | Sep 27 |
| 2015 | May 30 | Aug 22 | May 27 | Aug 31 |
| 2014 | Jun 12 | Aug 31 | Jun 6 | Aug 31 |
| 2013 | Jun 6 | Aug 25 | May 26 | Sep 16 |
| 2012 | no data | Aug 18 | no data | Aug 28 |
| 2011 | Jul 20 | Aug 11 | Jun 6 | Sep 26 |
| 2010 | Jul 9 | Aug 20 | May 26 | Sep 19 |
| 2009 | Jun 25 | Aug 3 | Jun 25 | Sep 15 |
| 2008 | Jul 1 | Aug 7 | Jun 9 | Sep 21 |
| 2007 | Jul 16 | Aug 7 | May 29 | Sep 22 |
| 2006 | Jun 24 | no data | Jun 7 | no data |
| 2005 | Jun 12 | Aug 27 | Jun 3 | Aug 27 |
"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.