Frost history / Lake Sharpe Prj, SD
Lake Sharpe Prj, SD: frost dates by year
Last spring and first fall frost at NOAA station USC00394766, 1972 to 2025, measured from daily minimum temperatures.
Elevation 1,461 ft, 44.064, -99.460. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 11 | Oct 7 |
| Earliest | Apr 14 (2007) | Sep 22 (2012) |
| Latest | May 25 (2024) | Oct 21 (2021) |
| Trend | little change (less than half a day per decade) | 0.9 days later per decade |
| Years with data | 22 | 14 |
At 28°F (hard freeze) the median last spring date is Apr 26 and the median first fall date is Oct 16.
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 | Apr 29 | Oct 13 | Apr 29 | Nov 9 |
| 2024 | May 25 | no data | Apr 22 | no data |
| 2023 | no data | Oct 7 | no data | Oct 27 |
| 2022 | May 22 | no data | Apr 27 | no data |
| 2021 | no data | Oct 21 | no data | Oct 21 |
| 2019 | May 11 | no data | May 3 | no data |
| 2018 | Apr 29 | Oct 4 | Apr 26 | Oct 15 |
| 2017 | Apr 30 | no data | Apr 30 | no data |
| 2016 | May 15 | Oct 7 | Apr 12 | Nov 19 |
| 2015 | May 20 | Oct 16 | Apr 23 | Nov 7 |
| 2014 | May 17 | Oct 4 | Apr 18 | Oct 29 |
| 2013 | May 13 | no data | May 4 | no data |
| 2012 | no data | Sep 22 | no data | Sep 22 |
| 2011 | May 4 | no data | May 4 | no data |
| 2010 | May 8 | no data | Apr 8 | no data |
| 2009 | May 17 | Oct 10 | Apr 11 | Oct 10 |
| 2008 | May 11 | no data | Apr 29 | no data |
| 2007 | Apr 14 | no data | Apr 10 | no data |
| 2006 | no data | Sep 28 | no data | Oct 12 |
| 2005 | no data | Oct 7 | no data | Oct 7 |
| 1986 | May 18 | no data | Apr 21 | no data |
| 1985 | Apr 27 | no data | Apr 9 | no data |
| 1983 | May 14 | no data | Apr 27 | no data |
| 1982 | Apr 30 | Oct 7 | Apr 22 | Oct 7 |
| 1981 | May 10 | no data | May 10 | no data |
| 1979 | May 11 | no data | Apr 30 | no data |
| 1978 | no data | Oct 6 | no data | Oct 7 |
| 1973 | May 17 | no data | Apr 27 | no data |
| 1972 | no data | Oct 6 | no data | Oct 17 |
"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.