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Will it freeze in Somerset in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Sat, Nov 7: 30°F (Sat, Nov 7, 6:00 PM EST to Sun, Nov 8, 6:00 AM EST).
Tonight: forecast low 46°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 46°F Above 36°F · Mostly Cloudy
- Fri, Nov 6 35°F Frost possible · Chance Light Rain
- Sat, Nov 7 30°F Freeze · Chance Light Rain
- Sun, Nov 8 30°F Freeze · Partly Cloudy
- Mon, Nov 9 33°F Frost possible · Mostly Clear
- Tue, Nov 10 32°F Freeze · Mostly Clear
- Wed, Nov 11 30°F Freeze · 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 Somerset
The median first fall hard-freeze date (28°F) is October 28, from NOAA’s 1991–2020 Climate Normals at Hidden Valley. 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 28 · May 11 · May 26 | Sep 25 · Oct 6 · Oct 19 | 149 days |
| 32°F freeze | Apr 19 · May 2 · May 18 | Oct 5 · Oct 17 · Oct 30 | 168 days |
| 28°F hard freeze | Apr 9 · Apr 22 · May 8 | Oct 14 · Oct 28 · Nov 11 | 189 days |
Average high temperature by month
1991–2020 normals at Hidden Valley
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 Somerset, PA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Hidden Valley (station USC00363928, elevation 2,876 ft), 9.8 mi from Somerset. 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 Somerset
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Johnstown, PA | 24 mi | Apr 29 | Oct 21 |
| Frostburg, MD | 25 mi | Apr 29 | Oct 18 |
| Latrobe, PA | 27 mi | May 1 | Oct 13 |
| Connellsville, PA | 27 mi | Apr 22 | Oct 27 |
| Cumberland, MD | 30 mi | Apr 15 | Oct 24 |
| Greensburg, PA | 32 mi | May 1 | Oct 13 |
| Uniontown, PA | 35 mi | Apr 30 | Oct 18 |
| Jeannette, PA | 36 mi | Apr 22 | Oct 25 |
| Indiana, PA | 43 mi | May 8 | Oct 13 |
| Murrysville, PA | 43 mi | Apr 22 | Oct 25 |
Frequently asked questions
When is the last frost in Somerset?
On average, the last spring frost (32°F) in Somerset is around May 2. In about 1 year in 10 it comes after May 18, and in 9 years in 10 it comes after April 19.
When is the first frost in Somerset?
The first fall frost (32°F) usually arrives around October 17. There’s a 10% chance of a freeze by October 5 and a 90% chance by October 30.
Can it frost in Somerset 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 11.
What growing zone is Somerset?
Somerset 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 15510. See growing zones in Pennsylvania.
More: all Pennsylvania frost dates · Pennsylvania growing zones · frost vs. freeze