Penns Grove, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Penns Grove, a borough in Salem County, New Jersey.
This Afternoon
78°F
Partly Sunny
Partly sunny, with a high near 78. East wind around 5 mph.
7-day forecast for Penns Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Partly Sunny | 5 mph E | 1% |
| Tonight | 65°F | Mostly Cloudy | 5 mph E | 13% |
| Sunday | 80°F | Rain Showers Likely | 5 to 10 mph S | 59% |
| Sunday Night | 63°F | Showers And Thunderstorms Likely | 5 mph W | 66% |
| Monday | 72°F | Partly Sunny then Chance Rain Showers | 5 to 10 mph NE | 32% |
| Monday Night | 59°F | Chance Rain Showers | 5 mph NE | 32% |
| Tuesday | 67°F | Chance Rain Showers | 5 to 10 mph NE | 40% |
| Tuesday Night | 57°F | Chance Rain Showers | 10 mph NE | 37% |
| Wednesday | 66°F | Chance Rain Showers | 10 to 15 mph NE | 26% |
| Wednesday Night | 57°F | Chance Rain Showers | 10 to 15 mph NE | 25% |
| Thursday | 66°F | Chance Rain Showers | 10 to 15 mph NE | 27% |
| Thursday Night | 54°F | Chance Rain Showers | 10 mph N | 31% |
| Friday | 67°F | Chance Rain Showers | 10 mph N | 31% |
| Friday Night | 55°F | Chance Rain Showers | 5 to 10 mph N | 31% |
Forecast source: National Weather Service (api.weather.gov) for Penns Grove (39.728, -75.469). Updated through the day.
Growing snapshot for Penns Grove
Last spring frost
Apr 7
First fall frost
Nov 4
Growing season
209 days
Hardiness zone
7b
More local growing data for Penns Grove: nearby ZIP 08069 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
Alloway
Auburn
Carneys Point
Elmer
Hancocks Bridge
Olivet
Pedricktown
Pennsville
Quinton
Salem
Seabrook Farms
Woodstown
Climate data from the nearest NOAA station, Wilmington Porter Rsch, De (6.9 mi from Penns Grove). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.