Frost dates for Shoup, ID
At Shoup, the median last spring frost (32°F) is May 3 and the median first fall frost is Oct 8, for a typical growing season of 157 days. For a 90% chance that the last frost has passed, wait until May 21. Nearby ZIP codes are in USDA hardiness zones 5a to 6a.
- May 3Last spring frost (median)50% chance of 32°F after this date
- May 21Safer planting date10% chance of 32°F after this date
- Oct 8First fall frost (median)50% chance of 32°F by this date
- 157 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 4 | May 19 | Jun 7 |
| 32°F | Apr 17 | May 3 | May 21 |
| 28°F | Mar 24 | Apr 15 | May 5 |
| 24°F | Mar 6 | Mar 24 | Apr 14 |
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 11 | Sep 26 | Oct 8 |
| 32°F | Sep 24 | Oct 8 | Oct 20 |
| 28°F | Oct 7 | Oct 20 | Nov 2 |
| 24°F | Oct 15 | Oct 31 | Nov 16 |
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 | 105 days | 129 days | 149 days |
| 32°F | 136 days | 157 days | 176 days |
| 28°F | 164 days | 189 days | 213 days |
| 24°F | 193 days | 221 days | 244 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 |
|---|---|---|---|
| 83466 | 6a | -10 to -5°F | 19 km |
| 83463 | 5b | -15 to -10°F | 32 km |
| 83469 | 5b | -15 to -10°F | 36 km |
| 83462 | 5b | -15 to -10°F | 37 km |
| 59829 | 5b | -15 to -10°F | 42 km |
| 83467 | 5b | -15 to -10°F | 50 km |
| 59827 | 5b | -15 to -10°F | 59 km |
| 59761 | 5a | -20 to -15°F | 60 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 USC00108395, at 45.3767, -114.2775, elevation 1036 m (3,400 ft).
- Data quality: Representative (10+ years), 13 years of freeze data.
- Average days per year at or below 32°F: 170.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Gibbonsville #2 (33 km)
- Salmon-Ksra (38 km)
- Taylor Rch (54 km)
- Yellowpine Bar (78 km)
- Red River Ranger Station (91 km)
- Middle Fork Lodge (93 km)
- Dixie N (94 km)
- Dixie (94 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.