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Will it freeze in Plymouth in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Sat, Nov 7: 31°F (Sat, Nov 7, 6:00 PM EST to Sun, Nov 8, 6:00 AM EST).
Tonight: forecast low 39°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM EST to Fri, Nov 6, 6:00 AM EST.
4 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 39°F Above 36°F · Rain Showers Likely
- Fri, Nov 6 36°F Frost possible · Chance Rain Showers
- Sat, Nov 7 31°F Freeze · Mostly Clear
- Sun, Nov 8 32°F Freeze · Mostly Clear
- Mon, Nov 9 40°F Above 36°F · Mostly Clear
- Tue, Nov 10 34°F Frost possible · 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 Plymouth
The median first fall hard-freeze date (28°F) is November 1, from NOAA’s 1991–2020 Climate Normals at Plymouth. 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 22 · May 6 · May 23 | Sep 27 · Oct 9 · Oct 24 | 154 days |
| 32°F freeze | Apr 12 · Apr 25 · May 13 | Oct 5 · Oct 21 · Nov 3 | 178 days |
| 28°F hard freeze | Mar 31 · Apr 14 · Apr 30 | Oct 19 · Nov 1 · Nov 15 | 200 days |
Average high temperature by month
1991–2020 normals at Plymouth
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 Plymouth, IN come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Plymouth (station USC00126989, elevation 815 ft), 1.1 mi from Plymouth. 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 Plymouth
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Nappanee, IN | 18 mi | Apr 26 | Oct 21 |
| Rochester, IN | 21 mi | Apr 23 | Oct 21 |
| South Bend, IN | 23 mi | Apr 23 | Oct 23 |
| Mishawaka, IN | 24 mi | Apr 23 | Oct 23 |
| Warsaw, IN | 25 mi | Apr 28 | Oct 18 |
| La Porte, IN | 27 mi | Apr 19 | Oct 27 |
| Winona Lake, IN | 28 mi | Apr 28 | Oct 18 |
| Goshen, IN | 30 mi | Apr 26 | Oct 21 |
| Elkhart, IN | 30 mi | Apr 26 | Oct 21 |
| Westville, IN | 33 mi | Apr 29 | Oct 13 |
Frequently asked questions
When is the last frost in Plymouth?
On average, the last spring frost (32°F) in Plymouth is around April 25. In about 1 year in 10 it comes after May 13, and in 9 years in 10 it comes after April 12.
When is the first frost in Plymouth?
The first fall frost (32°F) usually arrives around October 21. There’s a 10% chance of a freeze by October 5 and a 90% chance by November 3.
Can it frost in Plymouth 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 Plymouth?
Plymouth is in USDA Plant Hardiness Zone 6a (average annual extreme minimum temperature −10 to −5°F), based on the 2023 USDA map for ZIP code 46563. See growing zones in Indiana.
More: all Indiana frost dates · Indiana growing zones · frost vs. freeze