Frost history / Mission Ridge 5NW, SD
Mission Ridge 5NW, SD: frost dates by year
Last spring and first fall frost at NOAA station USC00395648, 2008 to 2025, measured from daily minimum temperatures.
Elevation 1,982 ft, 44.734, -100.804. Download the data (JSON) · NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 4 | Oct 13 |
| Earliest | Apr 18 (2012) | Oct 4 (2014) |
| Latest | May 16 (2014) | Oct 29 (2025) |
| Trend | 8.5 days earlier per decade | 6.4 days later per decade |
| Years with data | 14 | 15 |
At 28°F (hard freeze) the median last spring date is Apr 20 and the median first fall date is Oct 24.
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 21 | Oct 29 | Apr 19 | Nov 1 |
| 2024 | Apr 21 | Oct 15 | Apr 20 | Nov 7 |
| 2023 | no data | Oct 27 | no data | Oct 27 |
| 2022 | Apr 29 | Oct 7 | Apr 27 | Oct 18 |
| 2021 | May 15 | Oct 21 | Apr 25 | Oct 21 |
| 2018 | Apr 25 | no data | Apr 18 | no data |
| 2017 | May 3 | Oct 4 | Apr 29 | Oct 27 |
| 2016 | May 15 | Oct 7 | Apr 12 | Nov 18 |
| 2015 | May 11 | Oct 16 | Apr 23 | Oct 16 |
| 2014 | May 16 | Oct 4 | Apr 18 | Oct 8 |
| 2013 | May 6 | Oct 7 | May 5 | Oct 24 |
| 2012 | Apr 18 | Oct 5 | Apr 12 | Oct 5 |
| 2011 | May 3 | Oct 19 | Apr 21 | Oct 20 |
| 2010 | May 9 | Oct 18 | Mar 26 | Oct 28 |
| 2009 | May 16 | Oct 8 | Apr 11 | Oct 10 |
| 2008 | no data | Oct 13 | no data | Oct 27 |
"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 1991–2020 frost probabilities.