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Will it freeze in Harper Woods in the next 7 nights?
No overnight lows at or below 32°F are forecast in Harper Woods during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 41°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM EST to Fri, Nov 6, 6:00 AM EST.
1 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 41°F Above 36°F · Light Rain Likely
- Fri, Nov 6 37°F Above 36°F · Chance Light Rain
- Sat, Nov 7 35°F Frost possible · Partly Cloudy
- Sun, Nov 8 37°F Above 36°F · Mostly Clear
- Mon, Nov 9 42°F Above 36°F · Mostly Clear
- Tue, Nov 10 38°F Above 36°F · Mostly Clear
- Wed, Nov 11 37°F Above 36°F · Partly Cloudy
Overnight lows from the National Weather Service forecast for this location. This covers the available forecast window, not the first freeze of the whole season. Frost can form above 32°F on clear, calm nights.
Frost and freeze probabilities
Freeze dates shift from year to year. Spring percentages describe the chance of a freeze after the stated date; fall percentages describe the chance of a freeze by that date. The 10% spring date is the cautious one: a later freeze happens about 1 year in 10.
These dates describe historical probabilities, not this year’s forecast or the earliest and latest possible freezes. Different weather stations or probability thresholds can produce different published dates for the same city.
Average first hard freeze in Harper Woods
The median first fall hard-freeze date (28°F) is November 1, from NOAA’s 1991–2020 Climate Normals at Grosse Pointe Farms. This is the 50% probability date, not a forecast for this year.
| Temperature | Last spring date 90% · 50% · 10% chance of a later freeze | First fall date 10% · 50% · 90% chance of an earlier freeze | Season |
|---|---|---|---|
| 36°F frost possible | Apr 25 · May 8 · May 22 | Sep 26 · Oct 10 · Oct 24 | 154 days |
| 32°F freeze | Apr 15 · Apr 29 · May 13 | Oct 7 · Oct 22 · Nov 3 | 176 days |
| 28°F hard freeze | Apr 3 · Apr 16 · May 2 | Oct 19 · Nov 1 · Nov 14 | 198 days |
Average high temperature by month
1991–2020 normals at Grosse Pointe Farms
Average low temperature by month
Months with lows near or below freezing carry frost risk
Where these frost dates come from
The frost dates for Harper Woods, MI come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Grosse Pointe Farms (station USC00203477, elevation 613 ft), 3.0 mi from Harper Woods. Local conditions (valleys, hilltops, distance to water, city heat) can shift frost dates by days or weeks. The hardiness zone is from the 2023 USDA Plant Hardiness Zone Map (USDA ARS and Oregon State University PRISM). See our methodology.
Frost dates near Harper Woods
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Grosse Pointe Woods, MI | 1.2 mi | Apr 29 | Oct 22 |
| Eastpointe, MI | 1.9 mi | Apr 29 | Oct 22 |
| Grosse Pointe Farms, MI | 3.7 mi | Apr 29 | Oct 22 |
| Grosse Pointe, MI | 3.7 mi | Apr 29 | Oct 22 |
| St. Clair Shores, MI | 4.3 mi | Apr 29 | Oct 22 |
| Grosse Pointe Park, MI | 4.3 mi | Apr 29 | Oct 22 |
| Roseville, MI | 5.0 mi | Apr 29 | Oct 22 |
| Center Line, MI | 5.6 mi | Apr 21 | Oct 31 |
| Warren, MI | 6.2 mi | Apr 21 | Oct 31 |
| Fraser, MI | 6.8 mi | Apr 30 | Oct 24 |
Frequently asked questions
When is the last frost in Harper Woods?
On average, the last spring frost (32°F) in Harper Woods is around April 29. In about 1 year in 10 it comes after May 13, and in 9 years in 10 it comes after April 15.
When is the first frost in Harper Woods?
The first fall frost (32°F) usually arrives around October 22. There’s a 10% chance of a freeze by October 7 and a 90% chance by November 3.
Can it frost in Harper Woods after the last frost date?
Yes. Frost can form on clear, calm nights even when the air stays above 32°F. Temperatures of 36°F or lower, cold enough for frost on exposed plants, have a 50% chance of occurring after May 8.
What growing zone is Harper Woods?
Harper Woods is in USDA Plant Hardiness Zone 6b (average annual extreme minimum temperature −5 to 0°F), based on the 2023 USDA map for ZIP code 48225. See growing zones in Michigan.
More: all Michigan frost dates · Michigan growing zones · frost vs. freeze