Hackettstown, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hackettstown, a town in Warren County, New Jersey.
Tonight
56°F
Mostly Cloudy then Chance Rain Showers
A chance of rain showers after 2am. Mostly cloudy, with a low around 56. Southeast wind 0 to 5 mph. Chance of precipitation is 40%.
7-day forecast for Hackettstown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Mostly Cloudy then Chance Rain Showers | 0 to 5 mph SE | 35% |
| Sunday | 70°F | Rain Showers | 5 mph SE | 98% |
| Sunday Night | 54°F | Showers And Thunderstorms then Mostly Cloudy | 0 to 5 mph N | 79% |
| Monday | 68°F | Partly Sunny then Slight Chance Rain Showers | 5 mph NE | 22% |
| Monday Night | 49°F | Chance Rain Showers | 0 to 5 mph NE | 30% |
| Tuesday | 63°F | Chance Rain Showers | 5 mph NE | 33% |
| Tuesday Night | 48°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 31% |
| Wednesday | 62°F | Slight Chance Rain Showers | 10 mph NE | 19% |
| Wednesday Night | 47°F | Slight Chance Rain Showers | 5 to 10 mph NE | 21% |
| Thursday | 61°F | Chance Rain Showers | 5 to 10 mph NE | 25% |
| Thursday Night | 47°F | Chance Rain Showers | 5 to 10 mph NE | 31% |
| Friday | 65°F | Chance Rain Showers | 5 to 10 mph N | 33% |
| Friday Night | 49°F | Chance Rain Showers | 5 to 10 mph N | 33% |
| Saturday | 68°F | Chance Rain Showers | 5 to 10 mph N | 29% |
Forecast source: National Weather Service (api.weather.gov) for Hackettstown (40.854, -74.825). Updated through the day.
Growing snapshot for Hackettstown
Last spring frost
Apr 25
First fall frost
Oct 19
Growing season
175 days
Hardiness zone
6b
More local growing data for Hackettstown: nearby ZIP 07840 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
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Marksboro
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Climate data from the nearest NOAA station, Andover Aeroflex Ap, Nj (11.4 mi from Hackettstown). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.