Frost history / Shoshoni, WY
Shoshoni, WY: frost dates by year
Last spring and first fall frost at NOAA station USC00488209, 2008 to 2025, measured from daily minimum temperatures.
Elevation 4,837 ft, 43.237, -108.110. Download the data (JSON) · NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 12 | Oct 3 |
| Earliest | Apr 27 (2018) | Sep 9 (2020) |
| Latest | May 24 (2024) | Oct 22 (2015) |
| Trend | 1.5 days later per decade | 1.9 days earlier per decade |
| Years with data | 16 | 17 |
At 28°F (hard freeze) the median last spring date is May 2 and the median first fall date is Oct 13.
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 2 | Oct 7 | Apr 29 | Oct 21 |
| 2024 | May 24 | Oct 1 | May 4 | Oct 19 |
| 2023 | Apr 29 | Oct 7 | Apr 28 | Oct 26 |
| 2022 | May 22 | Oct 12 | Apr 25 | Oct 16 |
| 2021 | May 12 | Sep 21 | May 9 | Oct 12 |
| 2020 | May 24 | Sep 9 | Apr 21 | Sep 9 |
| 2019 | no data | Oct 3 | no data | Oct 3 |
| 2018 | Apr 27 | Sep 26 | Apr 27 | Oct 11 |
| 2017 | Apr 30 | Oct 3 | Apr 30 | Oct 9 |
| 2016 | May 13 | Oct 7 | May 13 | Oct 13 |
| 2015 | May 11 | Oct 22 | Apr 20 | Oct 24 |
| 2014 | May 14 | Oct 1 | May 13 | Oct 28 |
| 2013 | May 3 | no data | May 3 | no data |
| 2012 | May 8 | Oct 4 | May 6 | Oct 6 |
| 2011 | May 12 | Sep 22 | May 5 | Oct 19 |
| 2010 | May 14 | Oct 14 | May 8 | Oct 27 |
| 2009 | May 8 | Sep 22 | Apr 7 | Oct 2 |
| 2008 | no data | Oct 12 | no data | Oct 13 |
"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.