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Will it freeze in Hermitage in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Wed, Nov 11: 32°F (Wed, Nov 11, 6:00 PM EST to Thu, Nov 12, 6:00 AM EST).
Tonight: forecast low 45°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM EST to Fri, Nov 6, 6:00 AM EST.
6 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 45°F Above 36°F · Mostly Cloudy
- Fri, Nov 6 36°F Frost possible · Light Rain Likely
- Sat, Nov 7 34°F Frost possible · Chance Light Rain then Mostly Cloudy
- Sun, Nov 8 33°F Frost possible · Slight Chance Light Rain
- Mon, Nov 9 35°F Frost possible · Mostly Clear
- Tue, Nov 10 33°F Frost possible · Mostly Clear
- Wed, Nov 11 32°F Freeze · Mostly 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 Hermitage
The median first fall hard-freeze date (28°F) is October 13, from NOAA’s 1991–2020 Climate Normals at Mercer. 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 | May 10 · May 27 · Jun 19 | Sep 4 · Sep 23 · Oct 6 | 118 days |
| 32°F freeze | Apr 30 · May 15 · Jun 1 | Sep 19 · Oct 3 · Oct 19 | 140 days |
| 28°F hard freeze | Apr 19 · May 3 · May 21 | Sep 29 · Oct 13 · Nov 1 | 163 days |
Average high temperature by month
1991–2020 normals at Mercer
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 Hermitage, PA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Mercer (station USC00365651, elevation 1,220 ft), 11 mi from Hermitage. 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 Hermitage
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Sharon, PA | 3.1 mi | May 1 | Oct 17 |
| Hubbard, OH | 8.1 mi | May 1 | Oct 17 |
| Greenville, PA | 12 mi | May 4 | Oct 14 |
| Campbell, OH | 13 mi | Apr 30 | Oct 23 |
| Girard, OH | 14 mi | May 1 | Oct 17 |
| Youngstown, OH | 14 mi | May 1 | Oct 17 |
| Struthers, OH | 14 mi | Apr 30 | Oct 23 |
| Cortland, OH | 16 mi | Apr 30 | Oct 23 |
| Niles, OH | 16 mi | May 8 | Oct 12 |
| New Castle, PA | 17 mi | Apr 30 | Oct 23 |
Frequently asked questions
When is the last frost in Hermitage?
On average, the last spring frost (32°F) in Hermitage is around May 15. In about 1 year in 10 it comes after June 1, and in 9 years in 10 it comes after April 30.
When is the first frost in Hermitage?
The first fall frost (32°F) usually arrives around October 3. There’s a 10% chance of a freeze by September 19 and a 90% chance by October 19.
Can it frost in Hermitage 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 27.
What growing zone is Hermitage?
Hermitage 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 16148. See growing zones in Pennsylvania.
More: all Pennsylvania frost dates · Pennsylvania growing zones · frost vs. freeze