Watchung, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Watchung, a borough in Somerset County, New Jersey.
Tonight
59°F
Mostly Cloudy
Mostly cloudy. Low around 59, with temperatures rising to around 61 overnight. Southeast wind around 6 mph.
7-day forecast for Watchung
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Mostly Cloudy | 6 mph SE | 11% |
| Sunday | 71°F | Rain Showers | 5 to 8 mph SE | 86% |
| Sunday Night | 57°F | Showers And Thunderstorms | 5 to 10 mph W | 82% |
| Monday | 67°F | Chance Rain Showers | 6 to 10 mph NE | 25% |
| Monday Night | 52°F | Chance Rain Showers | 6 to 10 mph NE | 30% |
| Tuesday | 63°F | Chance Rain Showers | 10 mph NE | 31% |
| Tuesday Night | 50°F | Chance Rain Showers then Mostly Cloudy | 8 to 14 mph NE | 31% |
| Wednesday | 63°F | Mostly Cloudy then Slight Chance Rain Showers | 14 mph NE | 19% |
| Wednesday Night | 50°F | Slight Chance Rain Showers | 12 to 15 mph NE | 21% |
| Thursday | 61°F | Chance Rain Showers | 10 to 15 mph NE | 28% |
| Thursday Night | 50°F | Chance Rain Showers | 10 to 16 mph NE | 35% |
| Friday | 64°F | Chance Rain Showers | 10 to 15 mph N | 35% |
| Friday Night | 51°F | Chance Rain Showers | 10 to 15 mph N | 35% |
| Saturday | 67°F | Chance Rain Showers | 9 to 15 mph N | 30% |
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 Sep 20, 2026.