Frost dates for Mount Clemens Ang Base, MI
At Mount Clemens Ang Base, the median last spring frost (32°F) is Apr 30 and the median first fall frost is Oct 24, for a typical growing season of 174 days. For a 90% chance that the last frost has passed, wait until May 15. Nearby ZIP codes are in USDA hardiness zones 6a to 6b.
- Apr 30Last spring frost (median)50% chance of 32°F after this date
- May 15Safer planting date10% chance of 32°F after this date
- Oct 24First fall frost (median)50% chance of 32°F by this date
- 174 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 | Apr 28 | May 11 | May 28 |
| 32°F | Apr 16 | Apr 30 | May 15 |
| 28°F | Apr 3 | Apr 18 | May 3 |
| 24°F | Mar 23 | Apr 5 | Apr 20 |
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 26 | Oct 9 | Oct 24 |
| 32°F | Oct 7 | Oct 24 | Nov 3 |
| 28°F | Oct 20 | Nov 3 | Nov 15 |
| 24°F | Nov 1 | Nov 13 | Nov 28 |
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 | 129 days | 150 days | 169 days |
| 32°F | 153 days | 174 days | 192 days |
| 28°F | 177 days | 196 days | 216 days |
| 24°F | 201 days | 220 days | 241 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 |
|---|---|---|---|
| 48045 | 6b | -5 to 0°F | 2 km |
| 48043 | 6b | -5 to 0°F | 5 km |
| 48036 | 6b | -5 to 0°F | 8 km |
| 48047 | 6b | -5 to 0°F | 8 km |
| 48051 | 6b | -5 to 0°F | 9 km |
| 48035 | 6b | -5 to 0°F | 9 km |
| 48038 | 6b | -5 to 0°F | 10 km |
| 48044 | 6b | -5 to 0°F | 10 km |
| 48082 | 6b | -5 to 0°F | 11 km |
| 48042 | 6b | -5 to 0°F | 11 km |
| 48026 | 6b | -5 to 0°F | 13 km |
| 48048 | 6a | -10 to -5°F | 15 km |
| 48313 | 6b | -5 to 0°F | 15 km |
| 48315 | 6b | -5 to 0°F | 16 km |
| 48312 | 6b | -5 to 0°F | 17 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 USW00014804, at 42.6083, -82.8183, elevation 177 m (580 ft).
- Data quality: Standard (24+ years of data), 24 years of freeze data.
- Average days per year at or below 32°F: 129.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Algonac Wastewater Plant (22 km)
- Grosse Pointe Farms (23 km)
- Detroit City Airport (27 km)
- Richmond 4 NNW (30 km)
- Pontiac Wastewater Plant (36 km)
- Dearborn #2 (41 km)
- Dearborn (47 km)
- Farmington (47 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.