Frost history / Eagle Rvr Nature Ctr, AK
Eagle Rvr Nature Ctr, AK: frost dates by year
Last spring and first fall frost at NOAA station USC00502642, 1983 to 2025, measured from daily minimum temperatures.
Elevation 520 ft, 61.234, -149.271. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 22 | Sep 17 |
| Earliest | May 13 (2018) | Aug 29 (2015) |
| Latest | Jul 29 (2012) | Oct 4 (2022) |
| Trend | 0.9 days earlier per decade | 7.3 days later per decade |
| Years with data | 10 | 11 |
At 28°F (hard freeze) the median last spring date is May 2 and the median first fall date is Sep 26.
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 | May 26 | Sep 15 | May 9 | Sep 25 |
| 2024 | no data | Sep 17 | no data | Sep 22 |
| 2022 | May 15 | Oct 4 | May 15 | Oct 21 |
| 2021 | May 23 | Sep 20 | Apr 30 | Sep 21 |
| 2020 | May 27 | Sep 11 | May 2 | Oct 13 |
| 2019 | no data | Sep 23 | no data | Sep 26 |
| 2018 | May 13 | no data | May 2 | no data |
| 2017 | May 30 | Sep 10 | May 5 | Oct 14 |
| 2016 | no data | Sep 1 | no data | Oct 6 |
| 2015 | no data | Aug 29 | no data | Sep 9 |
| 2014 | May 20 | Sep 24 | Apr 20 | Sep 26 |
| 2013 | no data | Sep 20 | no data | Sep 20 |
| 2012 | Jul 29 | no data | May 9 | no data |
| 2008 | May 21 | no data | Apr 28 | no data |
| 1983 | May 22 | no data | Apr 14 | no data |
"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.