Cedar Knolls, NJ Weather & Growing Conditions
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. Northeast wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 0 mph | 0% |
| Tonight | 65°F | Mostly Cloudy | 0 mph | 1% |
| Wednesday | 83°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SE | 37% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 41% |
| Thursday | 88°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph SW | 51% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 51% |
| Friday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 48% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 48% |
| Saturday | 86°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 42% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 42% |
| Sunday | 87°F | Mostly Sunny | 0 to 5 mph W | 11% |
| Sunday Night | 71°F | Mostly Clear | 0 to 5 mph W | 11% |
| Monday | 88°F | Sunny | 0 to 10 mph W | 13% |
| Monday Night | 70°F | Partly Cloudy | 0 to 5 mph W | 13% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Cedar Knolls, NJ
Last spring frost
Apr 17
First fall frost
Oct 23
Growing season
189 days
Hardiness zone
7a
Explore more for Cedar Knolls, NJ: full frost dates · planting calendar · New Jersey frost dates
Climate data from the nearest NOAA station, Boonton 1 Se, Nj (5.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.