Frost dates for Aberdeen Exp. Station, ID
At Aberdeen Exp. Station, the median last spring frost (32°F) is May 21 and the median first fall frost is Sep 20, for a typical growing season of 118 days. For a 90% chance that the last frost has passed, wait until Jun 13. Nearby ZIP codes are in USDA hardiness zone 5b.
- May 21Last spring frost (median)50% chance of 32°F after this date
- Jun 13Safer planting date10% chance of 32°F after this date
- Sep 20First 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 23 | Jun 12 | Jun 28 |
| 32°F | May 4 | May 21 | Jun 13 |
| 28°F | Apr 20 | May 3 | May 17 |
| 24°F | Apr 6 | Apr 21 | May 5 |
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 21 | Sep 5 | Sep 22 |
| 32°F | Sep 2 | Sep 20 | Oct 4 |
| 28°F | Sep 15 | Oct 1 | Oct 17 |
| 24°F | Sep 27 | Oct 14 | Oct 31 |
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 | 63 days | 85 days | 110 days |
| 32°F | 91 days | 118 days | 141 days |
| 28°F | 127 days | 149 days | 170 days |
| 24°F | 153 days | 175 days | 198 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 83210 | 5b | -15 to -10°F | 8 km |
| 83277 | 5b | -15 to -10°F | 18 km |
| 83262 | 5b | -15 to -10°F | 29 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 USC00100010, at 42.9536, -112.8253, elevation 1343 m (4,405 ft).
- Data quality: Representative (10+ years), 24 years of freeze data.
- Average days per year at or below 32°F: 196.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- American Falls 6 NE (12 km)
- American Falls (17 km)
- Pocatello Regional Airport (21 km)
- Pocatello City (32 km)
- Pocatello 2 NE (35 km)
- Massacre Rocks State Park (35 km)
- Fort Hall 1 NNE (35 km)
- Blackfoot Fire Dept (47 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.