Checking current alerts… View NWS forecast and alerts.
Will it freeze in Monroe in the next 7 nights?
No overnight lows at or below 32°F are forecast in Monroe during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 40°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM EST to Fri, Nov 6, 6:00 AM EST.
5 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 40°F Above 36°F · Light Rain Likely
- Fri, Nov 6 35°F Frost possible · Chance Light Rain
- Sat, Nov 7 33°F Frost possible · Partly Cloudy
- Sun, Nov 8 34°F Frost possible · Mostly Clear
- Mon, Nov 9 40°F Above 36°F · Mostly Clear
- Tue, Nov 10 36°F Frost possible · 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 Monroe
The median first fall hard-freeze date (28°F) is November 4, from NOAA’s 1991–2020 Climate Normals at Monroe. 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 20 · May 2 · May 16 | Sep 28 · Oct 11 · Oct 26 | 162 days |
| 32°F freeze | Apr 8 · Apr 23 · May 7 | Oct 9 · Oct 23 · Nov 5 | 182 days |
| 28°F hard freeze | Mar 31 · Apr 14 · Apr 27 | Oct 21 · Nov 4 · Nov 18 | 204 days |
Average high temperature by month
1991–2020 normals at Monroe
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 Monroe, MI come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Monroe (station USC00205563, elevation 586 ft), 1.7 mi from Monroe. 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 Monroe
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Flat Rock, MI | 14 mi | Apr 27 | Oct 20 |
| Dundee, MI | 15 mi | Apr 27 | Oct 21 |
| Woodhaven, MI | 17 mi | Apr 20 | Oct 27 |
| Oregon, OH | 18 mi | Apr 20 | Oct 27 |
| Trenton, MI | 18 mi | Apr 20 | Oct 27 |
| Milan, MI | 19 mi | Apr 26 | Oct 19 |
| Riverview, MI | 20 mi | Apr 20 | Oct 27 |
| Toledo, OH | 21 mi | Apr 20 | Oct 27 |
| Romulus, MI | 21 mi | Apr 20 | Oct 27 |
| Northwood, OH | 22 mi | Apr 20 | Oct 27 |
Frequently asked questions
When is the last frost in Monroe?
On average, the last spring frost (32°F) in Monroe is around April 23. In about 1 year in 10 it comes after May 7, and in 9 years in 10 it comes after April 8.
When is the first frost in Monroe?
The first fall frost (32°F) usually arrives around October 23. There’s a 10% chance of a freeze by October 9 and a 90% chance by November 5.
Can it frost in Monroe 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 2.
What growing zone is Monroe?
Monroe 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 48162. See growing zones in Michigan.
More: all Michigan frost dates · Michigan growing zones · frost vs. freeze