Watchung, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Watchung, a borough in Somerset County, New Jersey.
Today
83°F
Mostly Sunny
Mostly sunny, with a high near 83. Northeast wind around 3 mph.
7-day forecast for Watchung
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny | 3 mph NE | 0% |
| Tonight | 64°F | Mostly Cloudy | 0 to 3 mph N | 1% |
| Wednesday | 82°F | Mostly Cloudy then Chance Showers And Thunderstorms | 0 to 5 mph E | 42% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms | 3 mph S | 36% |
| Thursday | 88°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 3 to 8 mph SW | 40% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms | 3 to 7 mph SW | 43% |
| Friday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 to 7 mph SW | 45% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 6 mph SW | 45% |
| Saturday | 86°F | Partly Sunny then Chance Showers And Thunderstorms | 3 to 7 mph W | 38% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms | 6 mph W | 38% |
| Sunday | 87°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 7 mph W | 15% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 6 mph SW | 15% |
| Monday | 88°F | Mostly Sunny | 3 to 9 mph W | 10% |
| Monday Night | 70°F | Partly Cloudy | 5 to 8 mph W | 12% |
Forecast source: National Weather Service (api.weather.gov) for Watchung (40.643, -74.436). Updated through the day.
Growing snapshot for Watchung
Last spring frost
Apr 11
First fall frost
Oct 28
Growing season
198 days
Hardiness zone
7a
More local growing data for Watchung: nearby ZIP 07069 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
East Rocky Hill
Far Hills
Finderne
Flagtown
Franklin Center
Franklin Park
Green Knoll
Griggstown
Harlingen
Hillsborough
Kingston
Lamington
Liberty Corner
Lyons
Manville
Martinsville
Middlebush
Millstone
Climate data from the nearest NOAA station, Plainfield, Nj (3.2 mi from Watchung). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.