Williamstown, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Williamstown, a community in Gloucester County, New Jersey.
This Afternoon
76°F
Partly Sunny
Partly sunny, with a high near 76. East wind around 5 mph.
7-day forecast for Williamstown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Partly Sunny | 5 mph E | 1% |
| Tonight | 60°F | Mostly Cloudy | 0 to 5 mph E | 4% |
| Sunday | 77°F | Partly Sunny then Chance Rain Showers | 5 to 10 mph SE | 38% |
| Sunday Night | 60°F | Showers And Thunderstorms Likely | 0 to 5 mph W | 73% |
| Monday | 70°F | Chance Rain Showers | 5 to 10 mph NE | 48% |
| Monday Night | 54°F | Chance Rain Showers | 5 to 10 mph NE | 35% |
| Tuesday | 65°F | Chance Rain Showers | 10 mph NE | 41% |
| Tuesday Night | 53°F | Chance Rain Showers | 10 mph NE | 38% |
| Wednesday | 64°F | Chance Rain Showers | 10 to 15 mph NE | 31% |
| Wednesday Night | 53°F | Chance Rain Showers | 10 to 15 mph NE | 32% |
| Thursday | 63°F | Chance Rain Showers | 10 to 15 mph NE | 36% |
| Thursday Night | 51°F | Chance Rain Showers | 5 to 10 mph N | 36% |
| Friday | 66°F | Chance Rain Showers | 5 to 10 mph N | 31% |
| Friday Night | 51°F | Chance Rain Showers | 5 mph N | 25% |
Forecast source: National Weather Service (api.weather.gov) for Williamstown (39.684, -74.969). Updated through the day.
Growing snapshot for Williamstown
Last spring frost
Apr 14
First fall frost
Oct 27
Growing season
196 days
Hardiness zone
7a
More local growing data for Williamstown: nearby ZIP 08094 weather · frost dates · planting calendar · New Jersey frost dates
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Climate data from the nearest NOAA station, Hammonton 1 Ne, Nj (8.2 mi from Williamstown). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.