Frost dates for Buckboard Marina, WY
At Buckboard Marina, the median last spring frost (32°F) is May 24 and the median first fall frost is Sep 23, for a typical growing season of 118 days. For a 90% chance that the last frost has passed, wait until Jun 8. Nearby ZIP codes are in USDA hardiness zones 4b to 5b.
- May 24Last spring frost (median)50% chance of 32°F after this date
- Jun 8Safer planting date10% chance of 32°F after this date
- Sep 23First fall frost (median)50% chance of 32°F by this date
- 118 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 |
|---|---|---|---|
| 36°F | May 25 | Jun 7 | Jun 23 |
| 32°F | May 11 | May 24 | Jun 8 |
| 28°F | Apr 28 | May 10 | May 26 |
| 24°F | Apr 12 | Apr 28 | May 13 |
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 |
|---|---|---|---|
| 36°F | Aug 31 | Sep 13 | Sep 25 |
| 32°F | Sep 8 | Sep 23 | Oct 5 |
| 28°F | Sep 19 | Oct 3 | Oct 16 |
| 24°F | Sep 29 | Oct 15 | Oct 26 |
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 | 75 days | 95 days | 115 days |
| 32°F | 98 days | 118 days | 138 days |
| 28°F | 122 days | 144 days | 163 days |
| 24°F | 145 days | 167 days | 187 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 82938 | 5b | -15 to -10°F | 30 km |
| 84046 | 5b | -15 to -10°F | 37 km |
| 82929 | 5a | -20 to -15°F | 41 km |
| 82935 | 5a | -20 to -15°F | 48 km |
| 84023 | 5b | -15 to -10°F | 50 km |
| 82934 | 4b | -25 to -20°F | 53 km |
| 82936 | 5b | -15 to -10°F | 53 km |
| 82901 | 5b | -15 to -10°F | 54 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 USC00481131, at 41.2467, -109.5967, elevation 1853 m (6,080 ft).
- Data quality: Representative (10+ years), 18 years of freeze data.
- Average days per year at or below 32°F: 203.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Green River (32 km)
- Church Buttes Gas Plant (44 km)
- Rock Springs Fire Dept (47 km)
- Rock Springs Airport (60 km)
- Mountain View (62 km)
- Fontenelle Dam (91 km)
- Bitter Creek 4 NE (98 km)
- Farson 2nne (100 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.