Frost history / Whitestone Farms, AK
Whitestone Farms, AK: frost dates by year
Last spring and first fall frost at NOAA station USC00509793, 2009 to 2025, measured from daily minimum temperatures.
Elevation 995 ft, 64.154, -145.889. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 28 | Aug 26 |
| Earliest | May 16 (2024) | Aug 8 (2011) |
| Latest | Jun 14 (2017) | Sep 8 (2023) |
| Trend | little change (less than half a day per decade) | 2.4 days later per decade |
| Years with data | 16 | 16 |
At 28°F (hard freeze) the median last spring date is May 16 and the median first fall date is Sep 15.
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 | Aug 12 | May 17 | Sep 25 |
| 2024 | May 16 | Sep 3 | May 16 | Sep 28 |
| 2023 | Jun 3 | Sep 8 | May 6 | Sep 23 |
| 2022 | May 25 | Aug 10 | May 24 | Sep 23 |
| 2021 | May 29 | Aug 29 | May 24 | Sep 15 |
| 2020 | May 18 | Sep 6 | May 18 | Sep 19 |
| 2019 | May 20 | Aug 19 | May 13 | Aug 19 |
| 2018 | Jun 13 | Sep 1 | May 16 | Sep 8 |
| 2017 | Jun 14 | Aug 18 | May 31 | Sep 26 |
| 2016 | May 26 | Aug 29 | May 9 | Aug 31 |
| 2015 | Jun 13 | Aug 21 | May 11 | Sep 2 |
| 2014 | Jun 12 | Aug 30 | May 21 | Aug 31 |
| 2013 | May 23 | no data | May 22 | no data |
| 2012 | May 30 | Aug 22 | May 18 | Sep 8 |
| 2011 | May 17 | Aug 8 | May 16 | Sep 9 |
| 2010 | May 18 | Sep 4 | May 14 | Sep 15 |
| 2009 | no data | Aug 20 | no data | Sep 15 |
"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.