Frost dates for Manistique Wastewater Plant, MI
At Manistique Wastewater Plant, the median last spring frost (32°F) is May 9 and the median first fall frost is Oct 10, for a typical growing season of 154 days. For a 90% chance that the last frost has passed, wait until May 23. Nearby ZIP codes are in USDA hardiness zone 5a.
- May 9Last spring frost (median)50% chance of 32°F after this date
- May 23Safer planting date10% chance of 32°F after this date
- Oct 10First fall frost (median)50% chance of 32°F by this date
- 154 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 8 | May 22 | Jun 4 |
| 32°F | Apr 27 | May 9 | May 23 |
| 28°F | Apr 11 | Apr 27 | May 10 |
| 24°F | Apr 1 | Apr 15 | Apr 28 |
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 | Sep 15 | Oct 1 | Oct 12 |
| 32°F | Sep 27 | Oct 10 | Oct 27 |
| 28°F | Oct 9 | Oct 26 | Nov 11 |
| 24°F | Oct 25 | Nov 7 | Nov 22 |
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 | 111 days | 130 days | 149 days |
| 32°F | 135 days | 154 days | 174 days |
| 28°F | 160 days | 181 days | 201 days |
| 24°F | 187 days | 206 days | 224 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 |
|---|---|---|---|
| 49854 | 5a | -20 to -15°F | 16 km |
| 49840 | 5a | -20 to -15°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 USC00205073, at 45.9511, -86.2514, elevation 183 m (600 ft).
- Data quality: Standard (24+ years of data), 30 years of freeze data.
- Average days per year at or below 32°F: 167.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Garden Corners (24 km)
- Rapid River 4sse (55 km)
- Engadine Mdot (56 km)
- Munsing Lakeshore (60 km)
- Munising (60 km)
- St. James 4ssw Beaver (62 km)
- Chatham 1 SE (67 km)
- Chatham Exp. Farm 2 (68 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.