Frost history / Sterling 6SW, AK
Sterling 6SW, AK: frost dates by year
Last spring and first fall frost at NOAA station USC00508731, 2012 to 2025, measured from daily minimum temperatures.
Elevation 292 ft, 60.491, -150.919. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 17 | Sep 22 |
| Earliest | May 7 (2020) | Sep 1 (2014) |
| Latest | Jun 7 (2014) | Oct 24 (2018) |
| Trend | 18.9 days earlier per decade | 22.3 days later per decade |
| Years with data | 13 | 13 |
At 28°F (hard freeze) the median last spring date is Apr 28 and the median first fall date is Oct 7.
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 10 | Oct 14 | Apr 20 | Oct 18 |
| 2024 | May 15 | Sep 20 | May 10 | Oct 15 |
| 2023 | May 22 | Sep 25 | Apr 24 | Sep 28 |
| 2022 | May 15 | Oct 11 | Apr 21 | Oct 13 |
| 2021 | May 17 | Sep 22 | May 1 | Sep 22 |
| 2020 | May 7 | Sep 11 | Apr 28 | Oct 16 |
| 2019 | May 12 | Sep 26 | Apr 28 | Oct 7 |
| 2018 | Jun 1 | Oct 24 | May 13 | Oct 30 |
| 2017 | Jun 1 | Sep 2 | Apr 25 | Oct 15 |
| 2016 | May 11 | Sep 27 | Apr 28 | Sep 28 |
| 2015 | May 28 | Sep 2 | May 4 | Sep 20 |
| 2014 | Jun 7 | Sep 1 | May 2 | Sep 26 |
| 2013 | Jun 6 | no data | May 21 | no data |
| 2012 | no data | Sep 11 | no data | Sep 12 |
"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.