Frost dates for Mc Minnville, OR
At Mc Minnville, the median last spring frost (32°F) is Apr 5 and the median first fall frost is Nov 7, for a typical growing season of 216 days. For a 90% chance that the last frost has passed, wait until Apr 27. Nearby ZIP codes are in USDA hardiness zone 8b.
- Apr 5Last spring frost (median)50% chance of 32°F after this date
- Apr 27Safer planting date10% chance of 32°F after this date
- Nov 7First fall frost (median)50% chance of 32°F by this date
- 216 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 | Apr 12 | Apr 29 | May 15 |
| 32°F | Mar 5 | Apr 5 | Apr 27 |
| 28°F | Jan 3 | Feb 20 | Mar 20 |
| 24°F | Dec 7 | Jan 13 | Feb 20 |
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 | Oct 5 | Oct 22 | Nov 9 |
| 32°F | Oct 20 | Nov 7 | Dec 1 |
| 28°F | Nov 5 | Nov 28 | Jan 2 |
| 24°F | Nov 18 | Dec 16 | Jan 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 | 152 days | 176 days | 200 days |
| 32°F | 186 days | 216 days | 255 days |
| 28°F | 241 days | 283 days | 329 days |
| 24°F | 296 days | 336 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 99% |
| 24°F | 78% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 97127 | 8b | 15 to 20°F | 5 km |
| 97111 | 8b | 15 to 20°F | 7 km |
| 97128 | 8b | 15 to 20°F | 9 km |
| 97148 | 8b | 15 to 20°F | 17 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 USC00355384, at 45.2214, -123.1622, elevation 47 m (155 ft).
- Data quality: Representative (10+ years), 15 years of freeze data.
- Average days per year at or below 32°F: 46.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- McMinnville Muni Airport (4 km)
- Rex 1 S (22 km)
- Aurora State Airport (31 km)
- Dallas 2 NE (32 km)
- N Willamette Exp. Station (33 km)
- Forest Grove (34 km)
- Beaverton 2 SSW (37 km)
- Salem McNary Field (37 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.