Lebanon, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lebanon, a borough in Hunterdon County, New Jersey.
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. North wind around 0 mph.
7-day forecast for Lebanon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 0 mph | 0% |
| Tonight | 62°F | Mostly Cloudy | 0 mph | 1% |
| Wednesday | 83°F | Partly Sunny then Chance Showers And Thunderstorms | 0 mph | 47% |
| Wednesday Night | 69°F | Chance Showers And Thunderstorms | 0 mph | 53% |
| Thursday | 88°F | Showers And Thunderstorms Likely | 0 to 5 mph SW | 62% |
| Thursday Night | 70°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph SW | 62% |
| Friday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 50% |
| Friday Night | 68°F | Chance Showers And Thunderstorms | 0 mph | 50% |
| Saturday | 86°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 43% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 0 to 5 mph NW | 43% |
| Sunday | 87°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 15% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph W | 15% |
| Monday | 88°F | Sunny | 0 to 5 mph W | 14% |
| Monday Night | 67°F | Partly Cloudy | 0 to 5 mph W | 14% |
Forecast source: National Weather Service (api.weather.gov) for Lebanon (40.642, -74.833). Updated through the day.
Growing snapshot for Lebanon
Last spring frost
Apr 24
First fall frost
Oct 21
Growing season
179 days
Hardiness zone
7a
More local growing data for Lebanon: nearby ZIP 08833 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
Annandale
Asbury
Bloomsbury
Califon
Clinton
Flemington
Frenchtown
Glen Gardner
Hampton
High Bridge
Lambertville
Milford
Oldwick
Pottersville
Ringoes
Stockton
Three Bridges
White House Station
Climate data from the nearest NOAA station, Flemington 5 Nnw, Nj (6 mi from Lebanon). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.