Frost history / Wally Noerenberg Hatchery, AK
Wally Noerenberg Hatchery, AK: frost dates by year
Last spring and first fall frost at NOAA station USC00509747, 2002 to 2025, measured from daily minimum temperatures.
Elevation 35 ft, 60.799, -148.087. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 17 | Oct 27 |
| Earliest | Apr 19 (2003) | Sep 29 (2008) |
| Latest | Jun 20 (2014) | Nov 10 (2015) |
| Trend | 5.2 days later per decade | 1.2 days earlier per decade |
| Years with data | 16 | 17 |
At 28°F (hard freeze) the median last spring date is Apr 22 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 | no data | Oct 28 | no data | Nov 12 |
| 2024 | May 16 | Oct 18 | Apr 24 | Oct 19 |
| 2023 | May 7 | no data | Apr 22 | no data |
| 2020 | May 27 | no data | May 16 | no data |
| 2019 | Apr 29 | Oct 13 | Apr 4 | Oct 14 |
| 2018 | May 13 | Oct 29 | Apr 5 | Oct 31 |
| 2017 | Jun 2 | Oct 20 | Apr 23 | Oct 20 |
| 2016 | no data | Oct 14 | no data | Oct 24 |
| 2015 | Apr 25 | Nov 10 | Mar 24 | Nov 11 |
| 2014 | Jun 20 | Oct 27 | Apr 24 | Nov 15 |
| 2013 | no data | Nov 9 | no data | Nov 17 |
| 2012 | May 28 | Oct 12 | May 17 | Oct 21 |
| 2011 | May 13 | Oct 27 | Apr 19 | Nov 3 |
| 2010 | May 18 | Oct 30 | Apr 10 | Nov 16 |
| 2009 | May 19 | Oct 30 | Apr 25 | Nov 11 |
| 2008 | May 20 | Sep 29 | Apr 29 | Oct 24 |
| 2007 | May 19 | Oct 11 | Apr 30 | Dec 1 |
| 2006 | no data | Oct 24 | no data | Nov 2 |
| 2004 | Apr 26 | no data | Apr 13 | no data |
| 2003 | Apr 19 | no data | Apr 7 | no data |
| 2002 | no data | Nov 9 | no data | Dec 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.