Frost dates for Wellston 1n, MI
At Wellston 1n, the median last spring frost (32°F) is May 28 and the median first fall frost is Sep 25, for a typical growing season of 119 days. For a 90% chance that the last frost has passed, wait until Jun 13. Nearby ZIP codes are in USDA hardiness zones 5a to 6a.
- May 28Last spring frost (median)50% chance of 32°F after this date
- Jun 13Safer planting date10% chance of 32°F after this date
- Sep 25First fall frost (median)50% chance of 32°F by this date
- 119 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 25 | Jun 9 | Jul 2 |
| 32°F | May 13 | May 28 | Jun 13 |
| 28°F | Apr 29 | May 18 | Jun 1 |
| 24°F | Apr 18 | May 5 | May 23 |
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 26 | Sep 14 | Sep 28 |
| 32°F | Sep 8 | Sep 25 | Oct 10 |
| 28°F | Sep 22 | Oct 8 | Oct 25 |
| 24°F | Oct 7 | Oct 24 | Nov 6 |
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 | 66 days | 95 days | 117 days |
| 32°F | 96 days | 119 days | 139 days |
| 28°F | 120 days | 144 days | 168 days |
| 24°F | 147 days | 169 days | 192 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 |
|---|---|---|---|
| 49689 | 5b | -15 to -10°F | 4 km |
| 49619 | 5b | -15 to -10°F | 8 km |
| 49644 | 5b | -15 to -10°F | 13 km |
| 49645 | 6a | -10 to -5°F | 17 km |
| 49638 | 5b | -15 to -10°F | 17 km |
| 49625 | 5b | -15 to -10°F | 24 km |
| 49668 | 5b | -15 to -10°F | 27 km |
| 49656 | 5a | -20 to -15°F | 28 km |
| 49304 | 5b | -15 to -10°F | 36 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 USC00208774, at 44.2294, -85.9572, elevation 236 m (773 ft).
- Data quality: Representative (10+ years), 13 years of freeze data.
- Average days per year at or below 32°F: 171.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Manistee 3se (27 km)
- Beulah 7ssw (36 km)
- Cadillac 9&10 News (44 km)
- Cadillac (45 km)
- Ludington 4 SE (50 km)
- Frankfort 2ne (51 km)
- Lake City Exp. Farm (61 km)
- Fife Lake 2wnw (61 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.