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Will it freeze in River Rouge in the next 7 nights?
No overnight lows at or below 32°F are forecast in River Rouge during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 42°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 42°F Above 36°F · Light Rain Likely
- Fri, Nov 6 38°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 43°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 River Rouge
The median first fall hard-freeze date (28°F) is November 6, from NOAA’s 1991–2020 Climate Normals at Dearborn #2. 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 6 · May 21 | Sep 30 · Oct 13 · Oct 27 | 158 days |
| 32°F freeze | Apr 12 · Apr 27 · May 11 | Oct 10 · Oct 25 · Nov 7 | 181 days |
| 28°F hard freeze | Apr 1 · Apr 15 · Apr 30 | Oct 24 · Nov 6 · Nov 21 | 205 days |
Average high temperature by month
1991–2020 normals at Dearborn #2
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 River Rouge, MI come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Dearborn #2 (station USC00202016, elevation 605 ft), 5.6 mi from River Rouge. 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 River Rouge
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Ecorse, MI | 1.9 mi | May 1 | Oct 15 |
| Melvindale, MI | 3.1 mi | May 1 | Oct 15 |
| Lincoln Park, MI | 3.7 mi | May 1 | Oct 15 |
| Allen Park, MI | 4.3 mi | May 1 | Oct 15 |
| Wyandotte, MI | 5.0 mi | May 1 | Oct 15 |
| Dearborn, MI | 5.0 mi | May 1 | Oct 15 |
| Southgate, MI | 6.2 mi | Apr 20 | Oct 27 |
| Detroit, MI | 7.5 mi | Apr 27 | Oct 25 |
| Riverview, MI | 8.1 mi | Apr 20 | Oct 27 |
| Taylor, MI | 8.1 mi | Apr 20 | Oct 27 |
Frequently asked questions
When is the last frost in River Rouge?
On average, the last spring frost (32°F) in River Rouge is around April 27. In about 1 year in 10 it comes after May 11, and in 9 years in 10 it comes after April 12.
When is the first frost in River Rouge?
The first fall frost (32°F) usually arrives around October 25. There’s a 10% chance of a freeze by October 10 and a 90% chance by November 7.
Can it frost in River Rouge 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 6.
What growing zone is River Rouge?
River Rouge 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 48218. See growing zones in Michigan.
More: all Michigan frost dates · Michigan growing zones · frost vs. freeze