Green Knoll, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Green Knoll, a community in Somerset County, New Jersey.
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. East wind around 0 mph.
7-day forecast for Green Knoll
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 0 mph | 0% |
| Tonight | 63°F | Mostly Cloudy | 0 mph | 1% |
| Wednesday | 84°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SE | 50% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms | 0 mph | 53% |
| Thursday | 90°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph SW | 44% |
| Thursday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 46% |
| Friday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 47% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 47% |
| Saturday | 88°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 40% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 40% |
| Sunday | 89°F | Mostly Sunny | 0 to 5 mph W | 12% |
| Sunday Night | 70°F | Mostly Clear | 0 to 5 mph W | 12% |
| Monday | 90°F | Sunny | 0 to 10 mph W | 11% |
| Monday Night | 69°F | Partly Cloudy | 0 to 5 mph W | 14% |
Forecast source: National Weather Service (api.weather.gov) for Green Knoll (40.605, -74.615). Updated through the day.
Growing snapshot for Green Knoll
Last spring frost
Apr 30
First fall frost
Oct 20
Growing season
172 days
Hardiness zone
7a
More local growing data for Green Knoll: nearby ZIP 08807 weather · frost dates · planting calendar · New Jersey frost dates
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Neshanic
Climate data from the nearest NOAA station, Somerville 4 Nw, Nj (2.4 mi from Green Knoll). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.