Harman US

Mountain Lakes, NJ Weather & Growing Conditions

Overnight
53°F
Mostly Cloudy
Mostly cloudy, with a low around 53. Northeast wind around 5 mph.

7-day forecast

WhenTempForecastWindPrecip
Overnight 53°F Mostly Cloudy 5 mph NE 0%
Saturday 70°F Mostly Sunny 0 to 5 mph E 1%
Saturday Night 55°F Mostly Cloudy 0 to 5 mph SE 11%
Sunday 67°F Rain Showers 5 mph SE 97%
Sunday Night 54°F Showers And Thunderstorms Likely 0 to 10 mph W 68%
Monday 65°F Chance Rain Showers then Partly Sunny 5 to 10 mph N 25%
Monday Night 49°F Mostly Cloudy then Slight Chance Rain Showers 5 mph NE 24%
Tuesday 61°F Chance Rain Showers 5 to 10 mph NE 29%
Tuesday Night 48°F Chance Rain Showers then Mostly Cloudy 5 to 10 mph NE 26%
Wednesday 61°F Slight Chance Rain Showers 10 to 15 mph NE 21%
Wednesday Night 48°F Chance Rain Showers 10 mph NE 30%
Thursday 60°F Chance Rain Showers 10 to 15 mph NE 33%
Thursday Night 48°F Chance Rain Showers 10 mph N 36%
Friday 63°F Chance Rain Showers 10 mph N 31%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Mountain Lakes, NJ

Last spring frost
Apr 17
First fall frost
Oct 23
Growing season
189 days
Hardiness zone
6b

Explore more for Mountain Lakes, NJ: full frost dates · planting calendar · New Jersey frost dates

Climate data from the nearest NOAA station, Boonton 1 Se, Nj (2.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.