Frost history / Lodgepole 5SW, SD
Lodgepole 5SW, SD: frost dates by year
Last spring and first fall frost at NOAA station USC00394956, 2008 to 2025, measured from daily minimum temperatures.
Elevation 2,570 ft, 45.748, -102.797. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 31 | Sep 8 |
| Earliest | May 15 (2010) | Aug 24 (2015) |
| Latest | Jun 25 (2017) | Sep 23 (2021) |
| Trend | 5.9 days later per decade | 6.0 days later per decade |
| Years with data | 15 | 17 |
At 28°F (hard freeze) the median last spring date is May 17 and the median first fall date is Sep 28.
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 | Jun 4 | Sep 6 | May 22 | Sep 6 |
| 2024 | no data | Sep 22 | no data | Sep 22 |
| 2023 | May 20 | Sep 16 | May 6 | Oct 6 |
| 2022 | Jun 3 | Sep 10 | Jun 3 | Sep 22 |
| 2021 | Jun 2 | Sep 23 | May 13 | Oct 17 |
| 2020 | Jun 19 | Sep 8 | May 18 | Sep 9 |
| 2019 | May 29 | Aug 28 | May 20 | Sep 28 |
| 2018 | no data | Sep 22 | no data | Sep 28 |
| 2017 | Jun 25 | no data | May 31 | no data |
| 2016 | May 29 | Sep 8 | May 18 | Oct 6 |
| 2015 | May 31 | Aug 24 | May 30 | Oct 13 |
| 2014 | May 18 | Sep 5 | May 17 | Sep 5 |
| 2013 | Jun 2 | Sep 19 | May 12 | Oct 5 |
| 2012 | no data | Sep 9 | no data | Sep 12 |
| 2011 | Jun 2 | Sep 4 | May 13 | Sep 15 |
| 2010 | May 15 | Sep 3 | May 9 | Oct 2 |
| 2009 | May 27 | Sep 9 | May 17 | Oct 8 |
| 2008 | May 28 | Sep 3 | May 12 | Sep 3 |
"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.