Frost dates for Kent City 2 SW, MI
At Kent City 2 SW, the median last spring frost (32°F) is May 14 and the median first fall frost is Sep 29, for a typical growing season of 135 days. For a 90% chance that the last frost has passed, wait until May 31. Nearby ZIP codes are in USDA hardiness zone 6a.
- May 14Last spring frost (median)50% chance of 32°F after this date
- May 31Safer planting date10% chance of 32°F after this date
- Sep 29First fall frost (median)50% chance of 32°F by this date
- 135 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 9 | May 29 | Jun 13 |
| 32°F | Apr 29 | May 14 | May 31 |
| 28°F | Apr 20 | May 2 | May 19 |
| 24°F | Apr 10 | Apr 23 | May 8 |
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 30 | Sep 18 | Oct 2 |
| 32°F | Sep 14 | Sep 29 | Oct 12 |
| 28°F | Sep 24 | Oct 8 | Oct 23 |
| 24°F | Oct 4 | Oct 22 | Nov 7 |
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 | 88 days | 112 days | 135 days |
| 32°F | 113 days | 135 days | 157 days |
| 28°F | 135 days | 158 days | 179 days |
| 24°F | 158 days | 182 days | 205 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 |
|---|---|---|---|
| 49318 | 6a | -10 to -5°F | 5 km |
| 49330 | 6a | -10 to -5°F | 5 km |
| 49345 | 6a | -10 to -5°F | 7 km |
| 49403 | 6a | -10 to -5°F | 10 km |
| 49303 | 6a | -10 to -5°F | 11 km |
| 49327 | 6a | -10 to -5°F | 15 km |
| 49321 | 6a | -10 to -5°F | 16 km |
| 49451 | 6a | -10 to -5°F | 16 km |
| 49319 | 6a | -10 to -5°F | 20 km |
| 49435 | 6a | -10 to -5°F | 20 km |
| 49343 | 6a | -10 to -5°F | 23 km |
| 49430 | 6a | -10 to -5°F | 23 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 USC00204320, at 43.1994, -85.7717, elevation 256 m (840 ft).
- Data quality: Estimated from nearby stations (2+ years), 11 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
- E Grand Rapids (32 km)
- Fremont 4 WSW (34 km)
- Muskegon Co Airport (38 km)
- Grand Haven Wastewater Plant (38 km)
- Grand Rapids (39 km)
- Nwsfo Grand Rapids (39 km)
- Greenville 2 NNE (43 km)
- Hesperia 4 WNW (51 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.