Hopatcong, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hopatcong, a borough in Sussex County, New Jersey.
Today
81°F
Mostly Sunny
Mostly sunny, with a high near 81. North wind around 0 mph.
7-day forecast for Hopatcong
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Mostly Sunny | 0 mph | 0% |
| Tonight | 62°F | Mostly Cloudy | 0 mph | 1% |
| Wednesday | 80°F | Partly Sunny then Chance Showers And Thunderstorms | 0 mph | 38% |
| Wednesday Night | 68°F | Chance Showers And Thunderstorms | 0 mph | 54% |
| Thursday | 84°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 69% |
| Thursday Night | 69°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph SW | 69% |
| Friday | 84°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 51% |
| Friday Night | 68°F | Chance Showers And Thunderstorms | 0 mph | 51% |
| Saturday | 83°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 53% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 53% |
| Sunday | 84°F | Mostly Sunny | 0 to 5 mph W | 12% |
| Sunday Night | 69°F | Mostly Clear | 0 to 5 mph W | 12% |
| Monday | 86°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 16% |
| Monday Night | 67°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph W | 16% |
Forecast source: National Weather Service (api.weather.gov) for Hopatcong (40.952, -74.662). Updated through the day.
Growing snapshot for Hopatcong
Last spring frost
Apr 25
First fall frost
Oct 19
Growing season
175 days
Hardiness zone
6b
More local growing data for Hopatcong: nearby ZIP 07843 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
Andover
Branchville
Byram Center
Crandon Lakes
Franklin
Hamburg
Highland Lakes
Lake Mohawk
Layton
Newton
Ogdensburg
Ross Corner
Stanhope
Sussex
Vernon Center
Vernon Valley
Climate data from the nearest NOAA station, Andover Aeroflex Ap, Nj (6.3 mi from Hopatcong). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.