Frost dates for Whitefish Point, MI
At Whitefish Point, the median last spring frost (32°F) is May 23 and the median first fall frost is Oct 15, for a typical growing season of 144 days. For a 90% chance that the last frost has passed, wait until Jun 8. Nearby ZIP codes are in USDA hardiness zones 4b to 5a.
- May 23Last spring frost (median)50% chance of 32°F after this date
- Jun 8Safer planting date10% chance of 32°F after this date
- Oct 15First fall frost (median)50% chance of 32°F by this date
- 144 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 7 | Jun 25 |
| 32°F | May 7 | May 23 | Jun 8 |
| 28°F | Apr 22 | May 5 | May 22 |
| 24°F | Apr 9 | Apr 22 | May 6 |
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 14 | Oct 2 | Oct 17 |
| 32°F | Sep 27 | Oct 15 | Oct 31 |
| 28°F | Oct 11 | Oct 30 | Nov 10 |
| 24°F | Oct 28 | Nov 9 | Nov 23 |
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 | 90 days | 115 days | 136 days |
| 32°F | 121 days | 144 days | 166 days |
| 28°F | 151 days | 175 days | 194 days |
| 24°F | 179 days | 200 days | 219 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 |
|---|---|---|---|
| 49768 | 5a | -20 to -15°F | 16 km |
| 49728 | 5a | -20 to -15°F | 40 km |
| 49748 | 5a | -20 to -15°F | 44 km |
| 49715 | 4b | -25 to -20°F | 45 km |
| 49868 | 5a | -20 to -15°F | 48 km |
| 49793 | 5a | -20 to -15°F | 59 km |
| 49780 | 4b | -25 to -20°F | 64 km |
| 49783 | 4b | -25 to -20°F | 65 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 USC00208920, at 46.7475, -84.9858, elevation 190 m (622 ft).
- Data quality: Representative (10+ years), 17 years of freeze data.
- Average days per year at or below 32°F: 173.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Paradise (16 km)
- Tahquamenon Falls State Park (24 km)
- Sault Ste Marie (53 km)
- Sault Ste Marie Sanderson Field (57 km)
- Rudyard 4n (59 km)
- Newberry Correctional Facility (61 km)
- Trout Lake 1sw (63 km)
- Rudyard 5se (72 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.