Mount Arlington, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Arlington, a borough in Morris County, New Jersey.
Tonight
55°F
Mostly Cloudy then Chance Rain Showers
A chance of rain showers after 2am. Mostly cloudy, with a low around 55. Southeast wind 0 to 5 mph. Chance of precipitation is 30%.
7-day forecast for Mount Arlington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Mostly Cloudy then Chance Rain Showers | 0 to 5 mph SE | 32% |
| Sunday | 68°F | Rain Showers | 5 mph SE | 97% |
| Sunday Night | 54°F | Showers And Thunderstorms then Mostly Cloudy | 0 to 10 mph NW | 78% |
| Monday | 66°F | Partly Sunny then Slight Chance Rain Showers | 5 to 10 mph NE | 20% |
| Monday Night | 49°F | Chance Rain Showers | 5 mph NE | 30% |
| Tuesday | 62°F | Chance Rain Showers | 5 mph NE | 31% |
| Tuesday Night | 47°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 29% |
| Wednesday | 62°F | Mostly Cloudy then Slight Chance Rain Showers | 10 mph NE | 18% |
| Wednesday Night | 47°F | Slight Chance Rain Showers | 5 to 10 mph NE | 20% |
| Thursday | 60°F | Chance Rain Showers | 5 to 10 mph NE | 26% |
| Thursday Night | 47°F | Chance Rain Showers | 5 to 15 mph NE | 33% |
| Friday | 63°F | Chance Rain Showers | 10 to 15 mph N | 33% |
| Friday Night | 49°F | Chance Rain Showers | 5 to 10 mph N | 34% |
| Saturday | 66°F | Chance Rain Showers | 5 to 10 mph N | 31% |
Forecast source: National Weather Service (api.weather.gov) for Mount Arlington (40.921, -74.641). Updated through the day.
Growing snapshot for Mount Arlington
Last spring frost
Apr 25
First fall frost
Oct 19
Growing season
175 days
Hardiness zone
6b
More local growing data for Mount Arlington: nearby ZIP 07856 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
Beattystown
Boonton
Brookside
Budd Lake
Cedar Knolls
Chester
Dover
Flanders
Florham Park
Gillette
Green Village
Hibernia
Kenvil
Kinnelon
Lake Hiawatha
Lake Hopatcong
Lake Telemark
Landing
Ledgewood
Lincoln Park
Long Valley
Lower Berkshire Valley
Macopin
Madison
Mendham
Millington
Morris Plains
Morristown
Mount Hope
Mount Tabor
Climate data from the nearest NOAA station, Andover Aeroflex Ap, Nj (8.6 mi from Mount Arlington). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.