Frost history / Aberdeen 35 Wnw, SD
Aberdeen 35 Wnw, SD: frost dates by year
Last spring and first fall frost at NOAA station USW00054933, 2007 to 2024, measured from daily minimum temperatures.
Elevation 1,957 ft, 45.711, -99.130. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 10 | Oct 6 |
| Earliest | Apr 21 (2024) | Sep 9 (2020) |
| Latest | May 22 (2022) | Oct 22 (2007) |
| Trend | 3.4 days earlier per decade | little change (less than half a day per decade) |
| Years with data | 16 | 18 |
At 28°F (hard freeze) the median last spring date is May 2 and the median first fall date is Oct 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 |
|---|---|---|---|---|
| 2024 | Apr 21 | Oct 15 | Apr 21 | Oct 15 |
| 2023 | May 2 | Oct 6 | May 2 | Oct 26 |
| 2022 | May 22 | Oct 6 | May 2 | Oct 6 |
| 2021 | May 10 | Oct 15 | May 4 | Oct 21 |
| 2020 | May 12 | Sep 9 | May 11 | Oct 15 |
| 2019 | May 7 | Oct 10 | May 7 | Oct 10 |
| 2018 | Apr 28 | Sep 28 | Apr 19 | Sep 28 |
| 2017 | May 2 | Oct 4 | Apr 29 | Oct 9 |
| 2016 | May 15 | Oct 6 | Apr 13 | Oct 7 |
| 2015 | May 18 | Oct 16 | Apr 23 | Oct 16 |
| 2014 | May 16 | Sep 13 | May 15 | Oct 3 |
| 2013 | May 12 | Oct 15 | May 4 | Oct 16 |
| 2012 | Apr 22 | Sep 22 | Apr 17 | Sep 22 |
| 2011 | May 3 | Sep 22 | May 2 | Oct 18 |
| 2010 | no data | Oct 2 | no data | Oct 27 |
| 2009 | May 16 | Oct 3 | May 16 | Oct 8 |
| 2008 | May 11 | Oct 9 | May 11 | Oct 16 |
| 2007 | no data | Oct 22 | no data | Oct 22 |
"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.