Frost history / Hoonah, AK
Hoonah, AK: frost dates by year
Last spring and first fall frost at NOAA station USC00503695, 1972 to 2025, measured from daily minimum temperatures.
Elevation 130 ft, 58.107, -135.428. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 5 | Oct 7 |
| Earliest | Apr 14 (1980) | Sep 16 (2006) |
| Latest | May 25 (2000) | Nov 3 (2013) |
| Trend | 2.8 days later per decade | 2.3 days later per decade |
| Years with data | 21 | 20 |
At 28°F (hard freeze) the median last spring date is Apr 15 and the median first fall date is Nov 2.
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 11 | no data | Nov 19 |
| 2024 | May 1 | Oct 20 | Apr 16 | Oct 20 |
| 2023 | May 4 | no data | Apr 11 | no data |
| 2022 | no data | Oct 24 | no data | Nov 2 |
| 2020 | May 3 | no data | Apr 12 | no data |
| 2019 | May 1 | Oct 8 | Mar 29 | Oct 8 |
| 2016 | Apr 21 | Oct 2 | Mar 15 | Oct 9 |
| 2015 | May 5 | no data | Apr 22 | no data |
| 2014 | Apr 25 | no data | Apr 13 | no data |
| 2013 | May 21 | Nov 3 | May 1 | Nov 9 |
| 2012 | May 15 | Oct 2 | Apr 9 | Oct 25 |
| 2011 | May 16 | Oct 2 | Apr 19 | Nov 3 |
| 2010 | May 3 | Oct 22 | Apr 12 | Nov 18 |
| 2009 | May 19 | Sep 29 | Apr 23 | Nov 13 |
| 2008 | May 19 | Oct 7 | Apr 21 | Nov 8 |
| 2007 | May 18 | Sep 28 | Apr 20 | Nov 9 |
| 2006 | May 16 | Sep 16 | Apr 15 | Oct 29 |
| 2001 | May 5 | Oct 25 | Apr 15 | Oct 31 |
| 2000 | May 25 | no data | Apr 19 | no data |
| 1999 | May 10 | Oct 29 | Apr 9 | Nov 4 |
| 1998 | Apr 14 | no data | Apr 10 | no data |
| 1996 | no data | Sep 28 | no data | Oct 23 |
| 1995 | no data | Oct 15 | no data | Oct 31 |
| 1980 | Apr 14 | no data | Mar 15 | no data |
| 1979 | Apr 21 | Oct 20 | Apr 18 | Nov 2 |
| 1978 | no data | Sep 26 | no data | Nov 8 |
| 1972 | no data | Sep 22 | no data | Sep 23 |
"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.