Checking current alerts… View NWS forecast and alerts.
Will it freeze in Monroe in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Sat, Nov 7: 32°F (Sat, Nov 7, 6:00 PM EST to Sun, Nov 8, 6:00 AM EST).
Tonight: forecast low 44°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 44°F Above 36°F · Mostly Cloudy
- Fri, Nov 6 35°F Frost possible · Partly Cloudy
- Sat, Nov 7 32°F Freeze · Partly Cloudy
- Sun, Nov 8 32°F Freeze · Mostly Clear
- Mon, Nov 9 37°F Above 36°F · Mostly Clear
- Tue, Nov 10 36°F Frost possible · Mostly Clear
- Wed, Nov 11 35°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 October 29, from NOAA’s 1991–2020 Climate Normals at Franklin. 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 4 · May 19 | Sep 27 · Oct 9 · Oct 21 | 158 days |
| 32°F freeze | Apr 9 · Apr 24 · May 11 | Oct 7 · Oct 19 · Nov 1 | 178 days |
| 28°F hard freeze | Mar 26 · Apr 11 · Apr 30 | Oct 16 · Oct 29 · Nov 11 | 199 days |
Average high temperature by month
1991–2020 normals at Franklin
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, OH come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Franklin (station USC00332928, elevation 679 ft), 7.8 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 |
|---|---|---|---|
| Middletown, OH | 3.7 mi | Apr 24 | Oct 19 |
| Trenton, OH | 5.6 mi | Apr 22 | Oct 18 |
| Mason, OH | 6.8 mi | Apr 22 | Oct 18 |
| Lebanon, OH | 8.1 mi | Apr 24 | Oct 19 |
| Franklin, OH | 8.7 mi | Apr 24 | Oct 19 |
| Carlisle, OH | 9.3 mi | Apr 24 | Oct 19 |
| South Lebanon, OH | 9.9 mi | Apr 23 | Oct 18 |
| Springboro, OH | 11 mi | Apr 17 | Oct 26 |
| Hamilton, OH | 11 mi | Apr 22 | Oct 18 |
| Sharonville, OH | 12 mi | Apr 22 | Oct 18 |
Frequently asked questions
When is the last frost in Monroe?
On average, the last spring frost (32°F) in Monroe is around April 24. In about 1 year in 10 it comes after May 11, and in 9 years in 10 it comes after April 9.
When is the first frost in Monroe?
The first fall frost (32°F) usually arrives around October 19. There’s a 10% chance of a freeze by October 7 and a 90% chance by November 1.
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 4.
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 45050. See growing zones in Ohio.
More: all Ohio frost dates · Ohio growing zones · frost vs. freeze