Frost dates for Bayview Model Basin, ID
At Bayview Model Basin, the median last spring frost (32°F) is May 22 and the median first fall frost is Sep 22, for a typical growing season of 122 days. For a 90% chance that the last frost has passed, wait until Jun 6. Nearby ZIP codes are in USDA hardiness zone 6b.
- May 22Last spring frost (median)50% chance of 32°F after this date
- Jun 6Safer planting date10% chance of 32°F after this date
- Sep 22First fall frost (median)50% chance of 32°F by this date
- 122 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 22 | Jun 7 | Jul 1 |
| 32°F | May 5 | May 22 | Jun 6 |
| 28°F | Apr 12 | May 4 | May 23 |
| 24°F | Mar 17 | Apr 7 | May 6 |
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 20 | Sep 6 | Sep 23 |
| 32°F | Sep 3 | Sep 22 | Oct 7 |
| 28°F | Sep 18 | Oct 4 | Oct 21 |
| 24°F | Oct 1 | Oct 20 | Nov 11 |
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 | 60 days | 89 days | 114 days |
| 32°F | 96 days | 122 days | 146 days |
| 28°F | 129 days | 154 days | 181 days |
| 24°F | 160 days | 195 days | 225 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 |
|---|---|---|---|
| 83801 | 6b | -5 to 0°F | 7 km |
| 83809 | 6b | -5 to 0°F | 9 km |
| 83803 | 6b | -5 to 0°F | 15 km |
| 83813 | 6b | -5 to 0°F | 17 km |
| 83869 | 6b | -5 to 0°F | 25 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 USC00100667, at 47.9803, -116.5594, elevation 636 m (2,087 ft).
- Data quality: Representative (10+ years), 22 years of freeze data.
- Average days per year at or below 32°F: 172.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Sandpoint Exp. Station (35 km)
- Coeur D'alene (38 km)
- Cabinet Gorge (39 km)
- Priest River Exp. Station (46 km)
- Kellogg (59 km)
- Prichard 3 ESE (61 km)
- Wallace (73 km)
- Saint Maries (74 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.