Mountain Lakes, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mountain Lakes, a borough in Morris County, New Jersey.
Overnight
62°F
Partly Cloudy
Partly cloudy, with a low around 62. Northwest wind around 0 mph.
7-day forecast for Mountain Lakes
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Partly Cloudy | 0 mph | 0% |
| Tuesday | 83°F | Mostly Sunny | 0 mph | 0% |
| Tuesday Night | 64°F | Mostly Cloudy | 0 mph | 1% |
| Wednesday | 82°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SE | 36% |
| Wednesday Night | 69°F | Chance Showers And Thunderstorms | 0 mph | 43% |
| Thursday | 87°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph SW | 53% |
| Thursday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 53% |
| Friday | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 48% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 48% |
| Saturday | 85°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 43% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 43% |
| Sunday | 86°F | Mostly Sunny | 0 to 5 mph W | 11% |
| Sunday Night | 70°F | Mostly Clear | 0 to 5 mph W | 11% |
| Monday | 88°F | Mostly Sunny | 0 to 10 mph W | 14% |
Forecast source: National Weather Service (api.weather.gov) for Mountain Lakes (40.891, -74.442). Updated through the day.
Growing snapshot for Mountain Lakes
Last spring frost
Apr 17
First fall frost
Oct 23
Growing season
189 days
Hardiness zone
6b
More local growing data for Mountain Lakes: nearby ZIP 07046 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 Arlington
Mount Hope
Climate data from the nearest NOAA station, Boonton 1 Se, Nj (2.4 mi from Mountain Lakes). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.