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.
Today
82°F
Sunny
Sunny, with a high near 82. North wind around 0 mph.
7-day forecast for Mount Arlington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Sunny | 0 mph | 0% |
| Tonight | 63°F | Mostly Cloudy | 0 mph | 1% |
| Wednesday | 81°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SE | 36% |
| Wednesday Night | 68°F | Chance Showers And Thunderstorms | 0 mph | 53% |
| Thursday | 85°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 67% |
| Thursday Night | 70°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph SW | 67% |
| Friday | 85°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 | 52% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 52% |
| Sunday | 85°F | Mostly Sunny | 0 to 5 mph W | 11% |
| Sunday Night | 68°F | Mostly Clear | 0 to 5 mph W | 11% |
| Monday | 86°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 15% |
| Monday Night | 67°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph W | 15% |
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
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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 Aug 4, 2026.