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Will it freeze in Greensburg in the next 7 nights?
No overnight lows at or below 32°F are forecast in Greensburg during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 47°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 47°F Above 36°F · Partly Cloudy
- Fri, Nov 6 38°F Above 36°F · Chance Light Rain
- Sat, Nov 7 36°F Frost possible · Chance Light Rain then Mostly Cloudy
- Sun, Nov 8 33°F Frost possible · Mostly Clear
- Mon, Nov 9 36°F Frost possible · Mostly Clear
- Tue, Nov 10 35°F Frost possible · Mostly Clear
- Wed, Nov 11 33°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 Greensburg
The median first fall hard-freeze date (28°F) is October 24, from NOAA’s 1991–2020 Climate Normals at Mt Pleasant. 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 13 · May 29 | Sep 21 · Oct 3 · Oct 14 | 143 days |
| 32°F freeze | Apr 17 · May 1 · May 19 | Oct 3 · Oct 13 · Oct 26 | 164 days |
| 28°F hard freeze | Apr 6 · Apr 20 · May 8 | Oct 10 · Oct 24 · Nov 8 | 186 days |
Average high temperature by month
1991–2020 normals at Mt Pleasant
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 Greensburg, PA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Mt Pleasant (station USC00366042, elevation 1,003 ft), 7.0 mi from Greensburg. 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 Greensburg
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Jeannette, PA | 3.7 mi | Apr 22 | Oct 25 |
| Latrobe, PA | 8.7 mi | May 1 | Oct 13 |
| Murrysville, PA | 11 mi | Apr 22 | Oct 25 |
| White Oak, PA | 14 mi | May 2 | Oct 20 |
| Monroeville, PA | 14 mi | Apr 22 | Oct 25 |
| McKeesport, PA | 16 mi | May 2 | Oct 20 |
| Duquesne, PA | 17 mi | Apr 5 | Nov 10 |
| Plum, PA | 17 mi | Apr 16 | Nov 1 |
| Forest Hills, PA | 18 mi | Apr 5 | Nov 10 |
| Clairton, PA | 18 mi | May 2 | Oct 20 |
Frequently asked questions
When is the last frost in Greensburg?
On average, the last spring frost (32°F) in Greensburg is around May 1. In about 1 year in 10 it comes after May 19, and in 9 years in 10 it comes after April 17.
When is the first frost in Greensburg?
The first fall frost (32°F) usually arrives around October 13. There’s a 10% chance of a freeze by October 3 and a 90% chance by October 26.
Can it frost in Greensburg 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 13.
What growing zone is Greensburg?
Greensburg 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 15601. See growing zones in Pennsylvania.
More: all Pennsylvania frost dates · Pennsylvania growing zones · frost vs. freeze