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
57°F
Slight Chance Rain Showers
A slight chance of rain showers after 4am. Mostly cloudy, with a low around 57. East wind 0 to 5 mph. Chance of precipitation is 20%.
7-day forecast for Mountain Lakes
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Slight Chance Rain Showers | 0 to 5 mph E | 24% |
| Sunday | 69°F | Rain Showers | 5 mph SE | 95% |
| Sunday Night | 55°F | Showers And Thunderstorms then Mostly Cloudy | 0 to 10 mph NW | 83% |
| Monday | 66°F | Partly Sunny then Slight Chance Rain Showers | 5 to 10 mph NE | 20% |
| Monday Night | 50°F | Chance Rain Showers | 5 mph NE | 30% |
| Tuesday | 62°F | Chance Rain Showers | 5 to 10 mph NE | 30% |
| Tuesday Night | 49°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 28% |
| Wednesday | 62°F | Mostly Cloudy then Slight Chance Rain Showers | 10 mph NE | 17% |
| Wednesday Night | 48°F | Slight Chance Rain Showers | 10 mph NE | 20% |
| Thursday | 61°F | Chance Rain Showers | 10 to 15 mph NE | 27% |
| Thursday Night | 48°F | Chance Rain Showers | 10 to 15 mph NE | 34% |
| Friday | 63°F | Chance Rain Showers | 10 to 15 mph N | 34% |
| Friday Night | 50°F | Chance Rain Showers | 10 mph N | 35% |
| Saturday | 67°F | Chance Rain Showers | 10 mph N | 31% |
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 Sep 20, 2026.