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.
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. East wind around 5 mph.
7-day forecast for Penns Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 5 mph E | 0% |
| Tonight | 69°F | Mostly Cloudy | 0 to 5 mph E | 11% |
| Wednesday | 84°F | Showers And Thunderstorms Likely | 0 to 5 mph SE | 79% |
| Wednesday Night | 74°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 5 mph S | 56% |
| Thursday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 20% |
| Thursday Night | 75°F | Slight Chance Showers And Thunderstorms | 5 mph SW | 23% |
| Friday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 mph SW | 33% |
| Friday Night | 74°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 43% |
| Saturday | 87°F | Partly Sunny then Chance Showers And Thunderstorms | 5 mph SW | 35% |
| Saturday Night | 72°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 35% |
| Sunday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 17% |
| Sunday Night | 73°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SW | 17% |
| Monday | 90°F | Sunny | 5 to 10 mph W | 10% |
| Monday Night | 73°F | Partly Cloudy | 5 mph W | 14% |
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 Aug 4, 2026.