Dunellen, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dunellen, a borough in Somerset County, New Jersey.
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. East wind around 2 mph.
7-day forecast for Dunellen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 2 mph E | 0% |
| Tonight | 65°F | Mostly Cloudy | 2 mph NE | 1% |
| Wednesday | 84°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph E | 47% |
| Wednesday Night | 71°F | Chance Showers And Thunderstorms | 3 mph S | 42% |
| Thursday | 90°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 1 to 7 mph SW | 38% |
| Thursday Night | 73°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 42% |
| Friday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph SW | 45% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 5 mph SW | 45% |
| Saturday | 88°F | Partly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph W | 38% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms | 1 to 5 mph W | 38% |
| Sunday | 89°F | Mostly Sunny | 2 to 7 mph W | 14% |
| Sunday Night | 71°F | Mostly Clear | 5 mph W | 14% |
| Monday | 90°F | Mostly Sunny | 2 to 9 mph W | 9% |
| Monday Night | 71°F | Partly Cloudy | 3 to 8 mph W | 13% |
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 Aug 4, 2026.