Frost history / Chamberlain Muni Ap, SD
Chamberlain Muni Ap, SD: frost dates by year
Last spring and first fall frost at NOAA station USW00094943, 1998 to 2024, measured from daily minimum temperatures.
Elevation 1,703 ft, 43.767, -99.318. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 11 | Oct 6 |
| Earliest | Apr 11 (2012) | Sep 22 (2011) |
| Latest | May 24 (2002) | Oct 27 (2007) |
| Trend | 1.3 days earlier per decade | 4.2 days later per decade |
| Years with data | 20 | 21 |
At 28°F (hard freeze) the median last spring date is Apr 17 and the median first fall date is Oct 14.
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 14 | Apr 21 | Oct 15 |
| 2023 | May 3 | Oct 6 | May 2 | Oct 7 |
| 2022 | May 22 | Oct 7 | Apr 26 | Oct 14 |
| 2021 | May 6 | Oct 17 | Apr 22 | Oct 31 |
| 2020 | May 11 | Oct 15 | Apr 17 | Oct 15 |
| 2013 | May 12 | Oct 16 | May 3 | Oct 24 |
| 2012 | Apr 11 | Sep 22 | Apr 11 | Oct 6 |
| 2011 | May 3 | Sep 22 | Apr 17 | Oct 19 |
| 2010 | May 8 | Oct 18 | Mar 28 | Oct 28 |
| 2009 | May 16 | Oct 4 | Apr 10 | Oct 9 |
| 2008 | May 11 | Oct 14 | Apr 28 | Oct 27 |
| 2007 | Apr 14 | Oct 27 | Apr 14 | Nov 5 |
| 2006 | May 12 | Oct 11 | Apr 8 | Oct 12 |
| 2005 | May 15 | Oct 6 | May 3 | Oct 6 |
| 2004 | May 14 | Oct 1 | Apr 13 | Oct 2 |
| 2003 | May 20 | Sep 30 | Apr 8 | Oct 25 |
| 2002 | May 24 | Oct 6 | May 2 | Oct 13 |
| 2001 | Apr 23 | Oct 6 | Apr 17 | Oct 6 |
| 2000 | May 13 | Sep 24 | Apr 16 | Oct 5 |
| 1999 | Apr 23 | Sep 27 | Apr 18 | Oct 1 |
| 1998 | no data | Oct 1 | no data | Nov 5 |
"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.