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Will it freeze in Brookhaven in the next 7 nights?
No overnight lows at or below 32°F are forecast in Brookhaven during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 62°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM EST to Fri, Nov 6, 6:00 AM EST.
No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.
- Tonight 62°F Above 36°F · Light Rain Likely
- Fri, Nov 6 51°F Above 36°F · Partly Cloudy
- Sat, Nov 7 45°F Above 36°F · Partly Cloudy
- Sun, Nov 8 42°F Above 36°F · Mostly Clear
- Mon, Nov 9 41°F Above 36°F · Mostly Clear
- Tue, Nov 10 42°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 Brookhaven
The median first fall hard-freeze date (28°F) is November 28, from NOAA’s 1991–2020 Climate Normals at Marcus Hook. 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 | Mar 30 · Apr 9 · Apr 22 | Oct 21 · Nov 2 · Nov 17 | 206 days |
| 32°F freeze | Mar 16 · Mar 30 · Apr 9 | Nov 2 · Nov 16 · Dec 2 | 230 days |
| 28°F hard freeze | Mar 4 · Mar 20 · Mar 31 | Nov 11 · Nov 28 · Dec 15 | 252 days |
Average high temperature by month
1991–2020 normals at Marcus Hook
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 Brookhaven, PA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Marcus Hook (station USC00365390, elevation 10 ft), 3.7 mi from Brookhaven. 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 Brookhaven
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Chester, PA | 1.9 mi | Mar 30 | Nov 16 |
| Swarthmore, PA | 3.1 mi | Apr 2 | Nov 10 |
| Media, PA | 3.1 mi | Mar 30 | Nov 16 |
| Ridley Park, PA | 3.7 mi | Apr 2 | Nov 10 |
| Prospect Park, PA | 4.3 mi | Apr 2 | Nov 10 |
| Norwood, PA | 5.0 mi | Apr 2 | Nov 10 |
| Glenolden, PA | 5.6 mi | Apr 2 | Nov 10 |
| Folcroft, PA | 6.2 mi | Apr 2 | Nov 10 |
| Clifton Heights, PA | 6.2 mi | Apr 2 | Nov 10 |
| Collingdale, PA | 6.8 mi | Apr 2 | Nov 10 |
Frequently asked questions
When is the last frost in Brookhaven?
On average, the last spring frost (32°F) in Brookhaven is around March 30. In about 1 year in 10 it comes after April 9, and in 9 years in 10 it comes after March 16.
When is the first frost in Brookhaven?
The first fall frost (32°F) usually arrives around November 16. There’s a 10% chance of a freeze by November 2 and a 90% chance by December 2.
Can it frost in Brookhaven 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 9.
What growing zone is Brookhaven?
Brookhaven is in USDA Plant Hardiness Zone 7b (average annual extreme minimum temperature 5 to 10°F), based on the 2023 USDA map for ZIP code 19015. See growing zones in Pennsylvania.
More: all Pennsylvania frost dates · Pennsylvania growing zones · frost vs. freeze