Frost dates for McCall, ID
At McCall, the median last spring frost (32°F) is Jun 22 and the median first fall frost is Sep 2, for a typical growing season of 72 days. For a 90% chance that the last frost has passed, wait until Jul 10. Nearby ZIP codes are in USDA hardiness zones 5a to 6b.
- Jun 22Last spring frost (median)50% chance of 32°F after this date
- Jul 10Safer planting date10% chance of 32°F after this date
- Sep 2First fall frost (median)50% chance of 32°F by this date
- 72 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 3 | Jun 22 | Jul 10 |
| 28°F | May 12 | Jun 3 | Jun 23 |
| 24°F | Apr 21 | May 7 | Jun 1 |
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 14 | Sep 2 | Sep 18 |
| 28°F | Aug 30 | Sep 15 | Oct 2 |
| 24°F | Sep 9 | Sep 29 | Oct 13 |
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 | 24 days | 44 days | 67 days |
| 32°F | 46 days | 72 days | 96 days |
| 28°F | 75 days | 103 days | 132 days |
| 24°F | 115 days | 144 days | 169 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 |
|---|---|---|---|
| 83615 | 5a | -20 to -15°F | 21 km |
| 83612 | 6a | -10 to -5°F | 34 km |
| 83643 | 6a | -10 to -5°F | 40 km |
| 83654 | 6a | -10 to -5°F | 40 km |
| 83638 | 5a | -20 to -15°F | 40 km |
| 83632 | 6a | -10 to -5°F | 47 km |
| 83547 | 6b | -5 to 0°F | 50 km |
| 83549 | 6b | -5 to 0°F | 54 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 USC00105708, at 44.8872, -116.1047, elevation 1532 m (5,025 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 217.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- McCall Airport (0 km)
- New Meadows Ranger Station (18 km)
- Council (30 km)
- Cascade 1 NW (41 km)
- Yellowpine (49 km)
- Warren (54 km)
- Riggins (57 km)
- Cambridge (57 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.