Califon, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Califon, a borough in Hunterdon County, New Jersey.
Today
82°F
Mostly Sunny
Mostly sunny, with a high near 82. East wind around 0 mph.
7-day forecast for Califon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Mostly Sunny | 0 mph | 0% |
| Tonight | 62°F | Mostly Cloudy | 0 mph | 1% |
| Wednesday | 81°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 mph | 45% |
| Wednesday Night | 68°F | Chance Showers And Thunderstorms | 0 mph | 52% |
| Thursday | 86°F | Showers And Thunderstorms Likely | 0 to 5 mph SW | 68% |
| Thursday Night | 70°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph SW | 68% |
| Friday | 86°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 | 84°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 46% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 0 mph | 46% |
| Sunday | 85°F | Mostly Sunny | 0 to 5 mph W | 12% |
| Sunday Night | 68°F | Mostly Clear | 0 to 5 mph SW | 12% |
| Monday | 87°F | Sunny | 0 to 5 mph W | 14% |
| Monday Night | 67°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 15% |
Forecast source: National Weather Service (api.weather.gov) for Califon (40.719, -74.837). Updated through the day.
Growing snapshot for Califon
Last spring frost
Apr 26
First fall frost
Oct 18
Growing season
176 days
Hardiness zone
6b
More local growing data for Califon: nearby ZIP 07830 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
Annandale
Asbury
Bloomsbury
Clinton
Flemington
Frenchtown
Glen Gardner
Hampton
High Bridge
Lambertville
Lebanon
Milford
Oldwick
Pottersville
Ringoes
Stockton
Three Bridges
White House Station
Climate data from the nearest NOAA station, Somerville Somerset Ap, Nj (9.3 mi from Califon). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.