Wyoming · NOAA station USC00488385
Frost dates for South Pass City, WY
South Pass City can freeze in any month: NOAA flags it as having a year-round risk of 32°F, too cold to compute spring and fall frost dates. The median stretch between 32°F freezes is 43 days. Nearby ZIP codes are in USDA hardiness zones 4a to 5a.
- 100%Chance of 32°F in a year
- 43 daysMedian freeze-free stretch
- 267Days at or below 32°Faverage per year
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 |
|---|---|---|---|
| 82520 | 5a | -20 to -15°F | 25 km |
| 82515 | 5a | -20 to -15°F | 52 km |
| 82923 | 4a | -30 to -25°F | 52 km |
| 82510 | 5a | -20 to -15°F | 61 km |
| 82932 | 4a | -30 to -25°F | 61 km |
| 82514 | 5a | -20 to -15°F | 69 km |
| 82512 | 5a | -20 to -15°F | 72 km |
| 82310 | 4b | -25 to -20°F | 76 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 USC00488385, at 42.4667, -108.8000, elevation 2390 m (7,840 ft).
- Data quality: Representative (10+ years), 17 years of freeze data.
- Average days per year at or below 32°F: 267.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Atlantic City (7 km)
- Lander 11 SSE (26 km)
- Lander Hunt Field Airport (39 km)
- Farson 2nne (63 km)
- Riverton (72 km)
- Riverton (72 km)
- Boulder Rearing Station (78 km)
- Jeffrey City (80 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.