Dunellen, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dunellen, a borough in Somerset County, New Jersey.
Today
73°F
Mostly Sunny
Mostly sunny. High near 73, with temperatures falling to around 71 in the afternoon. East wind around 7 mph.
7-day forecast for Dunellen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Mostly Sunny | 7 mph E | 1% |
| Tonight | 58°F | Mostly Cloudy | 5 mph E | 6% |
| Sunday | 72°F | Rain Showers | 3 to 7 mph SE | 90% |
| Sunday Night | 57°F | Showers And Thunderstorms Likely | 2 to 8 mph W | 71% |
| Monday | 68°F | Chance Rain Showers then Partly Sunny | 6 to 9 mph NE | 34% |
| Monday Night | 52°F | Mostly Cloudy then Chance Rain Showers | 5 to 9 mph NE | 26% |
| Tuesday | 63°F | Chance Rain Showers | 10 mph NE | 31% |
| Tuesday Night | 51°F | Chance Rain Showers | 8 to 12 mph NE | 26% |
| Wednesday | 64°F | Slight Chance Rain Showers | 14 mph NE | 24% |
| Wednesday Night | 51°F | Chance Rain Showers | 13 mph NE | 32% |
| Thursday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 33% |
| Thursday Night | 50°F | Chance Rain Showers | 8 to 12 mph NE | 35% |
| Friday | 65°F | Chance Rain Showers | 12 mph N | 32% |
| Friday Night | 51°F | Chance Rain Showers | 7 to 10 mph N | 30% |
Forecast source: National Weather Service (api.weather.gov) for Dunellen (40.590, -74.466). Updated through the day.
Growing snapshot for Dunellen
Last spring frost
Apr 11
First fall frost
Oct 28
Growing season
198 days
Hardiness zone
7a
More local growing data for Dunellen: nearby ZIP 08812 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
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Neshanic
Climate data from the nearest NOAA station, Plainfield, Nj (4 mi from Dunellen). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.