Frost dates for Hans Flat Ranger Station, UT
At Hans Flat Ranger Station, the median last spring frost (32°F) is May 1 and the median first fall frost is Oct 16, for a typical growing season of 163 days. For a 90% chance that the last frost has passed, wait until May 24. Nearby ZIP codes are in USDA hardiness zones 6b to 8a.
- May 1Last spring frost (median)50% chance of 32°F after this date
- May 24Safer planting date10% chance of 32°F after this date
- Oct 16First fall frost (median)50% chance of 32°F by this date
- 163 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 | Apr 28 | May 14 | Jun 3 |
| 32°F | Apr 18 | May 1 | May 24 |
| 28°F | Apr 4 | Apr 22 | May 9 |
| 24°F | Mar 10 | Apr 7 | Apr 25 |
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 | Sep 26 | Oct 7 | Oct 22 |
| 32°F | Oct 2 | Oct 16 | Nov 1 |
| 28°F | Oct 11 | Oct 26 | Nov 12 |
| 24°F | Oct 20 | Nov 6 | Nov 22 |
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 | 120 days | 144 days | 166 days |
| 32°F | 138 days | 163 days | 187 days |
| 28°F | 161 days | 185 days | 212 days |
| 24°F | 181 days | 210 days | 240 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 |
|---|---|---|---|
| 84734 | 7a | 0 to 5°F | 37 km |
| 84530 | 7a | 0 to 5°F | 68 km |
| 84775 | 7a | 0 to 5°F | 75 km |
| 84532 | 7a | 0 to 5°F | 75 km |
| 84535 | 6b | -5 to 0°F | 90 km |
| 84525 | 6b | -5 to 0°F | 91 km |
| 84533 | 8a | 10 to 15°F | 100 km |
| 84515 | 6b | -5 to 0°F | 102 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 USC00423600, at 38.2553, -110.1800, elevation 2012 m (6,600 ft).
- Data quality: Standard (24+ years of data), 26 years of freeze data.
- Average days per year at or below 32°F: 123.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Canyonlands-The Needles (38 km)
- Canyonlands-The Neck (39 km)
- Hite Ranger Station (46 km)
- Hanksville (48 km)
- Goblin Valley State Park (58 km)
- Arches National Park Hqs (63 km)
- Moab (66 km)
- Moab Canyonland Airport (67 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.