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Will it freeze in Greencastle in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Fri, Nov 6: 32°F (Fri, Nov 6, 6:00 PM EST to Sat, Nov 7, 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.
3 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 · Scattered Rain Showers
- Fri, Nov 6 32°F Freeze · Partly Cloudy
- Sat, Nov 7 31°F Freeze · Partly Cloudy
- Sun, Nov 8 33°F Frost possible · Mostly Clear
- Mon, Nov 9 38°F Above 36°F · Clear
- Tue, Nov 10 38°F Above 36°F · Mostly Clear
- Wed, Nov 11 38°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 Greencastle
The median first fall hard-freeze date (28°F) is October 26, from NOAA’s 1991–2020 Climate Normals at Greencastle 1 W. 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 23 · May 8 · May 25 | Sep 23 · Oct 4 · Oct 16 | 149 days |
| 32°F freeze | Apr 13 · Apr 27 · May 15 | Oct 1 · Oct 15 · Oct 26 | 169 days |
| 28°F hard freeze | Mar 31 · Apr 15 · May 2 | Oct 12 · Oct 26 · Nov 5 | 191 days |
Average high temperature by month
1991–2020 normals at Greencastle 1 W
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 Greencastle, IN come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Greencastle 1 W (station USC00123513, elevation 735 ft), 1.6 mi from Greencastle. 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 Greencastle
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Brazil, IN | 17 mi | Apr 14 | Oct 24 |
| Danville, IN | 21 mi | Apr 12 | Oct 29 |
| Plainfield, IN | 25 mi | Apr 12 | Oct 27 |
| Avon, IN | 25 mi | Apr 12 | Oct 29 |
| Mooresville, IN | 25 mi | Apr 12 | Oct 27 |
| Martinsville, IN | 27 mi | Apr 24 | Oct 15 |
| Crawfordsville, IN | 28 mi | Apr 27 | Oct 12 |
| Brownsburg, IN | 28 mi | Apr 12 | Oct 29 |
| Ellettsville, IN | 30 mi | Apr 15 | Oct 26 |
| Terre Haute, IN | 31 mi | Apr 15 | Oct 19 |
Frequently asked questions
When is the last frost in Greencastle?
On average, the last spring frost (32°F) in Greencastle is around April 27. In about 1 year in 10 it comes after May 15, and in 9 years in 10 it comes after April 13.
When is the first frost in Greencastle?
The first fall frost (32°F) usually arrives around October 15. There’s a 10% chance of a freeze by October 1 and a 90% chance by October 26.
Can it frost in Greencastle 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 8.
What growing zone is Greencastle?
Greencastle 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 46135. See growing zones in Indiana.
More: all Indiana frost dates · Indiana growing zones · frost vs. freeze