Frost history / Story, WY
Story, WY: frost dates by year
Last spring and first fall frost at NOAA station USC00488626, 2002 to 2025, measured from daily minimum temperatures.
Elevation 5,168 ft, 44.577, -106.906. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 26 | Sep 23 |
| Earliest | May 1 (2023) | Sep 8 (2008) |
| Latest | Jun 25 (2022) | Oct 23 (2022) |
| Trend | 2.4 days earlier per decade | 8.1 days later per decade |
| Years with data | 22 | 23 |
At 28°F (hard freeze) the median last spring date is May 8 and the median first fall date is Oct 5.
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 | May 7 | Oct 7 | Apr 23 | Oct 14 |
| 2024 | May 27 | Oct 3 | May 27 | Oct 30 |
| 2023 | May 1 | Oct 6 | Apr 23 | Oct 25 |
| 2022 | Jun 25 | Oct 23 | May 22 | Oct 24 |
| 2021 | Jun 12 | Sep 17 | Jun 1 | Sep 30 |
| 2020 | May 12 | Sep 8 | May 10 | Sep 9 |
| 2019 | Jun 9 | Sep 30 | May 20 | Oct 3 |
| 2018 | Jun 20 | Sep 28 | Apr 25 | Oct 9 |
| 2017 | May 20 | Sep 17 | Apr 30 | Oct 3 |
| 2016 | May 16 | Oct 5 | May 12 | Oct 5 |
| 2015 | May 22 | Oct 13 | May 22 | Oct 16 |
| 2014 | May 15 | Sep 11 | Apr 24 | Sep 12 |
| 2013 | Jun 5 | Sep 27 | May 3 | Oct 4 |
| 2012 | May 29 | Oct 4 | May 7 | Oct 4 |
| 2011 | May 27 | Sep 21 | May 5 | Oct 26 |
| 2010 | May 23 | Sep 18 | May 9 | Oct 27 |
| 2009 | Jun 9 | Sep 28 | May 2 | Oct 3 |
| 2008 | Jun 12 | Sep 8 | May 11 | Oct 9 |
| 2007 | May 26 | Sep 10 | Apr 20 | Oct 22 |
| 2006 | May 13 | Sep 23 | May 6 | Oct 10 |
| 2005 | no data | Sep 13 | no data | Oct 5 |
| 2004 | no data | Sep 21 | no data | Oct 1 |
| 2003 | May 20 | no data | May 20 | no data |
| 2002 | Jun 11 | Sep 22 | May 24 | Oct 2 |
"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.