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Will it freeze in Trenton in the next 7 nights?
No overnight lows at or below 32°F are forecast in Trenton 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.
2 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 62°F Above 36°F · Light Rain Likely
- Fri, Nov 6 49°F Above 36°F · Partly Cloudy
- Sat, Nov 7 42°F Above 36°F · Partly Cloudy
- Sun, Nov 8 38°F Above 36°F · Mostly Clear
- Mon, Nov 9 36°F Frost possible · Mostly Clear
- Tue, Nov 10 37°F Above 36°F · 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 Trenton
The median first fall hard-freeze date (28°F) is November 7, from NOAA’s 1991–2020 Climate Normals at Trenton State College. 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 16 · May 1 · May 17 | Oct 1 · Oct 15 · Oct 30 | 165 days |
| 32°F freeze | Apr 2 · Apr 17 · May 6 | Oct 11 · Oct 28 · Nov 10 | 192 days |
| 28°F hard freeze | Mar 18 · Apr 2 · Apr 17 | Oct 25 · Nov 7 · Nov 24 | 217 days |
Average high temperature by month
1991–2020 normals at Trenton State College
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 Trenton, NJ come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Trenton State College (station USC00288880, elevation 100 ft), 3.6 mi from Trenton. 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 Trenton
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Morrisville, PA | 1.2 mi | Apr 17 | Oct 28 |
| Bristol, PA | 9.3 mi | Apr 21 | Oct 25 |
| Princeton, NJ | 11 mi | Apr 25 | Oct 16 |
| Burlington, NJ | 11 mi | Apr 15 | Oct 29 |
| Hightstown, NJ | 13 mi | Apr 25 | Oct 16 |
| Hatboro, PA | 18 mi | Apr 11 | Nov 1 |
| Jamesburg, NJ | 19 mi | Apr 15 | Oct 26 |
| Doylestown, PA | 20 mi | Apr 13 | Oct 30 |
| Palmyra, NJ | 21 mi | Apr 15 | Oct 31 |
| Spotswood, NJ | 23 mi | Apr 15 | Oct 26 |
Frequently asked questions
When is the last frost in Trenton?
On average, the last spring frost (32°F) in Trenton is around April 17. In about 1 year in 10 it comes after May 6, and in 9 years in 10 it comes after April 2.
When is the first frost in Trenton?
The first fall frost (32°F) usually arrives around October 28. There’s a 10% chance of a freeze by October 11 and a 90% chance by November 10.
Can it frost in Trenton 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 1.
What growing zone is Trenton?
Trenton is in USDA Plant Hardiness Zone 7a (average annual extreme minimum temperature 0 to 5°F), based on the 2023 USDA map for ZIP code 08609. See growing zones in New Jersey.
More: all New Jersey frost dates · New Jersey growing zones · UV index today in Trenton · frost vs. freeze