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Will it freeze in Royal Oak in the next 7 nights?
No overnight lows at or below 32°F are forecast in Royal Oak 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.
3 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 33°F Frost possible · Partly Cloudy
- Sun, Nov 8 36°F Frost possible · Mostly Clear
- Mon, Nov 9 42°F Above 36°F · Mostly Clear
- Tue, Nov 10 37°F Above 36°F · Mostly Clear
- Wed, Nov 11 36°F Frost possible · 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 Royal Oak
The median first fall hard-freeze date (28°F) is November 9, from NOAA’s 1991–2020 Climate Normals at Detroit City Airport. 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 19 · May 1 · May 18 | Oct 2 · Oct 18 · Oct 31 | 167 days |
| 32°F freeze | Apr 7 · Apr 21 · May 6 | Oct 17 · Oct 31 · Nov 11 | 190 days |
| 28°F hard freeze | Mar 27 · Apr 8 · Apr 22 | Oct 29 · Nov 9 · Nov 23 | 214 days |
Average high temperature by month
1991–2020 normals at Detroit City Airport
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 Royal Oak, MI come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Detroit City Airport (station USW00014822, elevation 626 ft), 10 mi from Royal Oak. 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 Royal Oak
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Berkley, MI | 1.9 mi | May 1 | Oct 17 |
| Huntington Woods, MI | 1.9 mi | Apr 27 | Oct 25 |
| Clawson, MI | 1.9 mi | Apr 26 | Oct 22 |
| Madison Heights, MI | 2.5 mi | Apr 21 | Oct 31 |
| Oak Park, MI | 3.1 mi | Apr 27 | Oct 25 |
| Ferndale, MI | 3.7 mi | Apr 21 | Oct 31 |
| Birmingham, MI | 4.3 mi | Apr 26 | Oct 22 |
| Hazel Park, MI | 4.3 mi | Apr 21 | Oct 31 |
| Beverly Hills, MI | 4.3 mi | May 1 | Oct 17 |
| Troy, MI | 5.0 mi | Apr 26 | Oct 22 |
Frequently asked questions
When is the last frost in Royal Oak?
On average, the last spring frost (32°F) in Royal Oak is around April 21. In about 1 year in 10 it comes after May 6, and in 9 years in 10 it comes after April 7.
When is the first frost in Royal Oak?
The first fall frost (32°F) usually arrives around October 31. There’s a 10% chance of a freeze by October 17 and a 90% chance by November 11.
Can it frost in Royal Oak 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 1.
What growing zone is Royal Oak?
Royal Oak 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 48073. See growing zones in Michigan.
More: all Michigan frost dates · Michigan growing zones · UV index today in Royal Oak · frost vs. freeze