East Rocky Hill, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for East Rocky Hill, a community in Somerset County, New Jersey.
This Afternoon
74°F
Partly Sunny
Partly sunny, with a high near 74. East wind around 5 mph.
7-day forecast for East Rocky Hill
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Partly Sunny | 5 mph E | 1% |
| Tonight | 58°F | Mostly Cloudy | 0 to 5 mph SE | 6% |
| Sunday | 76°F | Showers And Thunderstorms | 5 mph SE | 80% |
| Sunday Night | 57°F | Showers And Thunderstorms Likely | 0 to 5 mph NW | 66% |
| Monday | 70°F | Chance Rain Showers | 5 to 10 mph NE | 28% |
| Monday Night | 52°F | Chance Rain Showers | 5 mph NE | 29% |
| Tuesday | 66°F | Chance Rain Showers | 5 to 10 mph NE | 35% |
| Tuesday Night | 50°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 35% |
| Wednesday | 65°F | Slight Chance Rain Showers | 10 mph NE | 20% |
| Wednesday Night | 50°F | Slight Chance Rain Showers | 10 mph NE | 21% |
| Thursday | 63°F | Chance Rain Showers | 10 mph NE | 29% |
| Thursday Night | 49°F | Chance Rain Showers | 10 mph NE | 35% |
| Friday | 66°F | Chance Rain Showers | 10 mph N | 36% |
| Friday Night | 50°F | Chance Rain Showers | 5 to 10 mph N | 36% |
Forecast source: National Weather Service (api.weather.gov) for East Rocky Hill (40.415, -74.618). Updated through the day.
Growing snapshot for East Rocky Hill
Last spring frost
Apr 16
First fall frost
Oct 27
Growing season
192 days
Hardiness zone
7a
More local growing data for East Rocky Hill: nearby ZIP 08553 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
Basking Ridge
Bedminster
Belle Mead
Bernardsville
Blackwells Mills
Blawenburg
Bound Brook
Bradley Gardens
Bridgewater Center
Clyde
Dunellen
East Millstone
Far Hills
Finderne
Flagtown
Franklin Center
Franklin Park
Green Knoll
Griggstown
Harlingen
Hillsborough
Kingston
Lamington
Liberty Corner
Lyons
Manville
Martinsville
Middlebush
Millstone
Neshanic
Climate data from the nearest NOAA station, Wertsville 4 Ne, Nj (8.2 mi from East Rocky Hill). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.