Frost history / Amber Lake, AK
Amber Lake, AK: frost dates by year
Last spring and first fall frost at NOAA station USC00500247, 2009 to 2025, measured from daily minimum temperatures.
Elevation 449 ft, 62.193, -150.503. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 28 | Sep 16 |
| Earliest | May 8 (2016) | Aug 22 (2021) |
| Latest | Jun 12 (2018) | Sep 23 (2022) |
| Trend | 2.3 days later per decade | 3.0 days later per decade |
| Years with data | 12 | 15 |
At 28°F (hard freeze) the median last spring date is May 16 and the median first fall date is Sep 23.
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 1 | Sep 17 | May 11 | Sep 30 |
| 2024 | May 21 | Sep 20 | May 15 | Sep 29 |
| 2023 | Jun 1 | Sep 19 | May 18 | Sep 19 |
| 2022 | May 26 | Sep 23 | May 25 | Oct 1 |
| 2021 | Jun 2 | Aug 22 | May 19 | Sep 19 |
| 2020 | May 27 | Sep 6 | May 7 | Sep 12 |
| 2018 | Jun 12 | Sep 2 | May 26 | Oct 2 |
| 2017 | May 30 | no data | May 26 | no data |
| 2016 | May 8 | Sep 19 | May 5 | Sep 26 |
| 2015 | May 20 | Aug 28 | May 6 | Sep 1 |
| 2014 | Jun 12 | Aug 31 | Apr 30 | Aug 31 |
| 2013 | no data | Sep 19 | no data | Sep 21 |
| 2012 | no data | Aug 28 | no data | Sep 11 |
| 2011 | no data | Sep 9 | no data | Sep 27 |
| 2010 | May 23 | Sep 19 | May 16 | Sep 26 |
| 2009 | no data | Sep 16 | 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.