Frost history / Metlakatla 6 S, AK
Metlakatla 6 S, AK: frost dates by year
Last spring and first fall frost at NOAA station USW00025381, 2012 to 2024, measured from daily minimum temperatures.
Elevation 105 ft, 55.046, -131.588. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 12 | Oct 21 |
| Earliest | Mar 18 (2016) | Oct 4 (2018) |
| Latest | Apr 30 (2013) | Nov 10 (2014) |
| Trend | 0.5 days earlier per decade | 4.6 days earlier per decade |
| Years with data | 12 | 13 |
At 28°F (hard freeze) the median last spring date is Mar 17 and the median first fall date is Nov 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 |
|---|---|---|---|---|
| 2024 | Apr 16 | Oct 21 | Mar 9 | Oct 22 |
| 2023 | Apr 12 | Oct 26 | Mar 13 | Oct 26 |
| 2022 | Apr 17 | Nov 1 | Apr 16 | Nov 2 |
| 2021 | Apr 12 | Oct 16 | Apr 10 | Nov 16 |
| 2020 | Apr 11 | Oct 21 | Apr 4 | Nov 8 |
| 2019 | Mar 31 | Oct 8 | Mar 9 | Nov 27 |
| 2018 | Apr 4 | Oct 4 | Mar 8 | Nov 7 |
| 2017 | Mar 21 | Oct 26 | Mar 19 | Nov 3 |
| 2016 | Mar 18 | Oct 11 | Feb 22 | Nov 20 |
| 2015 | Apr 22 | Oct 27 | Mar 16 | Nov 24 |
| 2014 | Apr 13 | Nov 10 | Mar 23 | Nov 12 |
| 2013 | Apr 30 | Nov 2 | Mar 21 | Nov 3 |
| 2012 | no data | Oct 18 | no data | Oct 24 |
"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.