Checking current alerts… View NWS forecast and alerts.
Will it freeze in Fanwood in the next 7 nights?
No overnight lows at or below 32°F are forecast in Fanwood during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 61°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 61°F Above 36°F · Chance Light Rain then Patchy Fog
- Fri, Nov 6 51°F Above 36°F · Chance Light Rain then Partly Cloudy
- Sat, Nov 7 44°F Above 36°F · Partly Cloudy
- Sun, Nov 8 41°F Above 36°F · Mostly Clear
- Mon, Nov 9 39°F Above 36°F · Mostly Clear
- Tue, Nov 10 40°F Above 36°F · Mostly Clear
- Wed, Nov 11 37°F Above 36°F · Mostly Clear
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 Fanwood
The median first fall hard-freeze date (28°F) is November 7, from NOAA’s 1991–2020 Climate Normals at Plainfield. 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 12 · Apr 27 · May 13 | Oct 3 · Oct 17 · Nov 1 | 173 days |
| 32°F freeze | Mar 31 · Apr 11 · Apr 27 | Oct 13 · Oct 28 · Nov 10 | 198 days |
| 28°F hard freeze | Mar 16 · Mar 31 · Apr 11 | Oct 24 · Nov 7 · Nov 23 | 223 days |
Average high temperature by month
1991–2020 normals at Plainfield
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 Fanwood, NJ come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Plainfield (station USC00287079, elevation 90 ft), 2.8 mi from Fanwood. 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 Fanwood
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Westfield, NJ | 2.5 mi | Apr 11 | Oct 31 |
| Plainfield, NJ | 2.5 mi | Apr 11 | Oct 28 |
| Watchung, NJ | 2.5 mi | Apr 11 | Oct 28 |
| Mountainside, NJ | 3.1 mi | Apr 11 | Oct 31 |
| North Plainfield, NJ | 3.1 mi | Apr 11 | Oct 28 |
| Garwood, NJ | 3.1 mi | Apr 11 | Oct 31 |
| New Providence, NJ | 4.3 mi | Apr 18 | Oct 27 |
| South Plainfield, NJ | 5.0 mi | Apr 11 | Oct 28 |
| Summit, NJ | 5.0 mi | Apr 18 | Oct 27 |
| Dunellen, NJ | 5.6 mi | Apr 11 | Oct 28 |
Frequently asked questions
When is the last frost in Fanwood?
On average, the last spring frost (32°F) in Fanwood is around April 11. In about 1 year in 10 it comes after April 27, and in 9 years in 10 it comes after March 31.
When is the first frost in Fanwood?
The first fall frost (32°F) usually arrives around October 28. There’s a 10% chance of a freeze by October 13 and a 90% chance by November 10.
Can it frost in Fanwood 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 27.
What growing zone is Fanwood?
Fanwood 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 07023. See growing zones in New Jersey.
More: all New Jersey frost dates · New Jersey growing zones · frost vs. freeze