Frost history / Delta Junction 20 Se, AK
Delta Junction 20 Se, AK: frost dates by year
Last spring and first fall frost at NOAA station USC00502352, 1996 to 2025, measured from daily minimum temperatures.
Elevation 1,125 ft, 63.965, -145.105. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 7 | Aug 18 |
| Earliest | May 17 (2011) | Aug 2 (2009) |
| Latest | Jul 31 (2005) | Sep 6 (2020) |
| Trend | little change (less than half a day per decade) | 3.9 days later per decade |
| Years with data | 28 | 27 |
At 28°F (hard freeze) the median last spring date is May 21 and the median first fall date is Aug 31.
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 7 | Aug 30 | May 18 | Sep 13 |
| 2024 | May 31 | Aug 15 | May 19 | Aug 31 |
| 2023 | Jun 15 | Sep 3 | May 23 | Sep 3 |
| 2022 | Jul 30 | Aug 10 | May 25 | Sep 2 |
| 2021 | May 30 | Aug 22 | May 26 | Aug 29 |
| 2020 | Jun 7 | Sep 6 | May 19 | Sep 13 |
| 2019 | May 20 | Aug 19 | May 14 | Aug 20 |
| 2018 | Jun 14 | Aug 19 | May 17 | Sep 2 |
| 2017 | Jun 1 | Aug 18 | May 31 | Sep 3 |
| 2016 | Jun 1 | Aug 18 | May 25 | Sep 1 |
| 2015 | Jun 13 | Aug 17 | May 18 | Aug 29 |
| 2014 | Jun 12 | Aug 31 | May 23 | Aug 31 |
| 2013 | Jun 6 | no data | May 22 | no data |
| 2012 | Jul 9 | Aug 22 | May 30 | Aug 22 |
| 2011 | May 17 | Aug 8 | May 17 | Aug 28 |
| 2010 | May 19 | Aug 21 | May 18 | Sep 3 |
| 2009 | Jun 26 | Aug 2 | May 20 | Aug 22 |
| 2008 | Jun 6 | Aug 12 | May 31 | Sep 1 |
| 2007 | Jun 8 | Aug 10 | May 19 | Sep 3 |
| 2006 | Jun 7 | Aug 3 | Jun 6 | Aug 24 |
| 2005 | Jul 31 | Aug 19 | May 17 | Aug 19 |
| 2004 | Jun 4 | Aug 30 | May 14 | Aug 30 |
| 2003 | no data | Aug 9 | no data | Aug 20 |
| 2002 | Jun 18 | no data | May 13 | no data |
| 2001 | Jun 16 | no data | May 26 | no data |
| 2000 | May 30 | Aug 7 | May 30 | Aug 17 |
| 1999 | Jun 6 | Aug 28 | Jun 1 | Sep 10 |
| 1998 | Jun 5 | Aug 14 | May 18 | Aug 19 |
| 1997 | Jun 2 | Aug 20 | Jun 2 | Sep 2 |
| 1996 | no data | Aug 8 | no data | Sep 3 |
"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.