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Will it freeze in Ambridge in the next 7 nights?
No overnight lows at or below 32°F are forecast in Ambridge during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 48°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 48°F Above 36°F · Partly Cloudy
- Fri, Nov 6 39°F Above 36°F · Chance Light Rain
- Sat, Nov 7 38°F Above 36°F · Chance Light Rain then Mostly Cloudy
- Sun, Nov 8 36°F Frost possible · Mostly Clear
- Mon, Nov 9 38°F Above 36°F · Mostly Clear
- Tue, Nov 10 36°F Frost possible · Mostly Clear
- Wed, Nov 11 36°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 Ambridge
The median first fall hard-freeze date (28°F) is November 18, from NOAA’s 1991–2020 Climate Normals at Glenwillard Dashields L&d. 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 7 · Apr 24 · May 13 | Oct 13 · Oct 28 · Nov 10 | 186 days |
| 32°F freeze | Mar 25 · Apr 8 · Apr 26 | Oct 27 · Nov 8 · Nov 24 | 212 days |
| 28°F hard freeze | Mar 14 · Mar 29 · Apr 12 | Nov 5 · Nov 18 · Dec 4 | 235 days |
Average high temperature by month
1991–2020 normals at Glenwillard Dashields L&d
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 Ambridge, PA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Glenwillard Dashields L&d (station USC00363343, elevation 710 ft), 3.2 mi from Ambridge. 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 Ambridge
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Aliquippa, PA | 2.5 mi | Apr 8 | Nov 8 |
| Economy, PA | 4.3 mi | Apr 8 | Nov 8 |
| Coraopolis, PA | 6.2 mi | Apr 28 | Oct 18 |
| Franklin Park, PA | 6.8 mi | Apr 24 | Oct 27 |
| Monaca, PA | 6.8 mi | Apr 27 | Oct 25 |
| New Brighton, PA | 11 mi | Apr 27 | Oct 25 |
| Bellevue, PA | 11 mi | Apr 24 | Oct 27 |
| West View, PA | 11 mi | Apr 24 | Oct 27 |
| McKees Rocks, PA | 12 mi | Apr 24 | Oct 27 |
| Beaver Falls, PA | 12 mi | Apr 27 | Oct 25 |
Frequently asked questions
When is the last frost in Ambridge?
On average, the last spring frost (32°F) in Ambridge is around April 8. In about 1 year in 10 it comes after April 26, and in 9 years in 10 it comes after March 25.
When is the first frost in Ambridge?
The first fall frost (32°F) usually arrives around November 8. There’s a 10% chance of a freeze by October 27 and a 90% chance by November 24.
Can it frost in Ambridge 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 April 24.
What growing zone is Ambridge?
Ambridge 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 15003. See growing zones in Pennsylvania.
More: all Pennsylvania frost dates · Pennsylvania growing zones · frost vs. freeze