Frost dates for Petoskey, MI
At Petoskey, the median last spring frost (32°F) is May 6 and the median first fall frost is Oct 20, for a typical growing season of 166 days. For a 90% chance that the last frost has passed, wait until May 21. Nearby ZIP codes are in USDA hardiness zones 5a to 5b.
- May 6Last spring frost (median)50% chance of 32°F after this date
- May 21Safer planting date10% chance of 32°F after this date
- Oct 20First fall frost (median)50% chance of 32°F by this date
- 166 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 3 | May 20 | Jun 3 |
| 32°F | Apr 23 | May 6 | May 21 |
| 28°F | Apr 9 | Apr 23 | May 7 |
| 24°F | Mar 30 | Apr 11 | Apr 24 |
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 22 | Oct 5 | Oct 21 |
| 32°F | Oct 2 | Oct 20 | Nov 4 |
| 28°F | Oct 18 | Nov 3 | Nov 18 |
| 24°F | Nov 1 | Nov 15 | Dec 1 |
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 | 120 days | 139 days | 159 days |
| 32°F | 143 days | 166 days | 186 days |
| 28°F | 173 days | 193 days | 212 days |
| 24°F | 197 days | 217 days | 238 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 |
|---|---|---|---|
| 49770 | 5b | -15 to -10°F | 8 km |
| 49722 | 5b | -15 to -10°F | 10 km |
| 49796 | 5b | -15 to -10°F | 11 km |
| 49764 | 5a | -20 to -15°F | 13 km |
| 49740 | 5b | -15 to -10°F | 17 km |
| 49706 | 5a | -20 to -15°F | 17 km |
| 49712 | 5b | -15 to -10°F | 18 km |
| 49713 | 5a | -20 to -15°F | 20 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 USC00206507, at 45.3725, -84.9767, elevation 183 m (599 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 147.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Petoskey Ncmc (2 km)
- Boyne Falls (23 km)
- Charlevoix (24 km)
- E Jordan 2nw (25 km)
- Pellston Regional Airport (26 km)
- Pellston Airport #2 (27 km)
- E Jordan (27 km)
- Cross Village 1e (30 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.