Frost dates for Craters Of The Moon, ID
At Craters Of The Moon, the median last spring frost (32°F) is Jun 19 and the median first fall frost is Sep 9, for a typical growing season of 81 days. For a 90% chance that the last frost has passed, wait until Jul 2. Nearby ZIP codes are in USDA hardiness zones 5a to 6a.
- Jun 19Last spring frost (median)50% chance of 32°F after this date
- Jul 2Safer planting date10% chance of 32°F after this date
- Sep 9First fall frost (median)50% chance of 32°F by this date
- 81 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 5 | Jun 19 | Jul 2 |
| 28°F | May 19 | Jun 7 | Jun 23 |
| 24°F | May 1 | May 21 | Jun 12 |
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 25 | Sep 9 | Sep 23 |
| 28°F | Sep 5 | Sep 21 | Oct 3 |
| 24°F | Sep 18 | Oct 1 | Oct 15 |
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 | 38 days | 61 days | 80 days |
| 32°F | 61 days | 81 days | 101 days |
| 28°F | 84 days | 105 days | 126 days |
| 24°F | 106 days | 131 days | 156 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 |
|---|---|---|---|
| 83213 | 5a | -20 to -15°F | 16 km |
| 83320 | 6a | -10 to -5°F | 27 km |
| 83255 | 5a | -20 to -15°F | 29 km |
| 83348 | 6a | -10 to -5°F | 50 km |
| 83313 | 5b | -15 to -10°F | 53 km |
| 83333 | 6a | -10 to -5°F | 56 km |
| 83251 | 5a | -20 to -15°F | 62 km |
| 83262 | 5b | -15 to -10°F | 64 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 USC00102260, at 43.4628, -113.5600, elevation 1803 m (5,914 ft).
- Data quality: Representative (10+ years), 15 years of freeze data.
- Average days per year at or below 32°F: 190.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Arco 17 SW (0 km)
- Arco (28 km)
- Picabo (44 km)
- Idaho Falls 46 W (50 km)
- Mackay Lost River Ranger Station (51 km)
- Bellevue (56 km)
- Howe (57 km)
- Chilly Barton Flat (61 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.