National Weather ServiceWyomingFreeze WarningArchive to October 1, 2026
Freeze Warnings in Wyoming
The National Weather Service issued 11 freeze warnings for Wyoming in 2025 and 6 a year on average in 2008-2025; in 2021-2025 it had the 38th most of any state. 2026 through September: 14, 250% above the average of 4 for those months in 2008-2025. Star Valley was covered most often (33 times since 2008).
How many freeze warnings does Wyoming get?
Every freeze warning that covered part of Wyoming. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 14 |
| 2025 | 11 |
| 2024 | 5 |
| 2023 | 8 |
| 2022 | 6 |
| 2021 | 3 |
| 2020 | 7 |
| 2019 | 12 |
| 2018 | 6 |
| 2017 | 5 |
| 2016 | 10 |
| 2015 | 4 |
| 2014 | 7 |
| 2013 | 3 |
| 2012 | 4 |
| 2011 | 4 |
| 2010 | 7 |
| 2009 | 9 |
| 2008 | 4 |
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
When in the year does Wyoming get them?
Sum of 2008-2025; the busiest month is labelled.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
Where in Wyoming?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Star Valley | 33 | 9 | September 15, 2026 |
| Upper Green River Basin Foothills | 32 | 6 | September 9, 2026 |
| Upper Green River Basin | 32 | 6 | September 9, 2026 |
| Jackson Hole | 32 | 7 | September 9, 2026 |
| Wind River Basin | 29 | 9 | May 20, 2026 |
| Lander Foothills | 27 | 8 | May 20, 2026 |
| Natrona County Lower Elevations | 24 | 8 | May 20, 2026 |
| South Lincoln County | 23 | 5 | September 9, 2026 |
| Rock Springs and Green River | 23 | 4 | October 7, 2025 |
| Northeastern Crook | 22 | 8 | May 20, 2026 |
| Northeast Johnson County | 22 | 8 | May 19, 2026 |
| Flaming Gorge | 22 | 3 | October 7, 2025 |
The NWS issues these products for counties or forecast zones; a zone can be part of a county or a mountain range.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
The latest freeze warnings for Wyoming in AreaZine's record
NWS RivertonWarningSeptember 14, 2026
Freeze Warning: Star Valley, WY
Expired 9:00 a.m. MDT, September 15, 2026
NWS RivertonWarningSeptember 13, 2026
Freeze Warning: Star Valley, WY
Expired 9:00 a.m. MDT, September 14, 2026
NWS RivertonWarningSeptember 8, 2026
Freeze Warning: Jackson Hole, Star Valley, Upper Green River Basin Foothills and 2 more, WY
Expired 9:00 a.m. MDT, September 9, 2026
This list is AreaZine's record of the NWS alert feed, kept since April 6, 2026; the counts above come from the complete IEM archive.
Source: National Weather Service alerts (api.weather.gov).
What is a freeze warning?
A freeze warning means temperatures at or below 32°F are expected during the growing season, enough to kill crops and sensitive plants. Since 2024-2025 it also covers the colder nights that had a hard freeze warning of their own. A warning means the hazard is happening, about to happen, or very likely: act now to protect people and property. AreaZine's counts include the hard freeze warnings issued before the change. The national record · Every warning type in Wyoming.