Frost dates for Moose 1 NNE, WY
At Moose 1 NNE, the median last spring frost (32°F) is Jun 24 and the median first fall frost is Aug 28, for a typical growing season of 63 days. For a 90% chance that the last frost has passed, wait until Jul 11. Nearby ZIP codes are in USDA hardiness zone 4a.
- Jun 24Last spring frost (median)50% chance of 32°F after this date
- Jul 11Safer planting date10% chance of 32°F after this date
- Aug 28First fall frost (median)50% chance of 32°F by this date
- 63 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 32°F | Jun 8 | Jun 24 | Jul 11 |
| 28°F | May 16 | Jun 7 | Jun 23 |
| 24°F | Apr 30 | May 14 | Jun 7 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 32°F | Aug 8 | Aug 28 | Sep 12 |
| 28°F | Aug 24 | Sep 12 | Sep 28 |
| 24°F | Sep 10 | Sep 27 | Oct 12 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 20 days | 34 days | 55 days |
| 32°F | 39 days | 63 days | 84 days |
| 28°F | 71 days | 96 days | 123 days |
| 24°F | 106 days | 131 days | 154 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 83012 | 4a | -30 to -25°F | 10 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USW00004131, at 43.6614, -110.7119, elevation 1971 m (6,466 ft).
- Data quality: Representative (10+ years), 16 years of freeze data.
- Average days per year at or below 32°F: 234.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Moose (1 km)
- Jackson (20 km)
- Moran 5wnw (24 km)
- Alta 1 NNW (29 km)
- Darwin Rch (52 km)
- Snake River (53 km)
- Bondurant (56 km)
- Dubois (86 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.