Mountain Lake, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mountain Lake, a community in Warren County, New Jersey.
Today
82°F
Mostly Sunny
Mostly sunny, with a high near 82. Northeast wind around 0 mph.
7-day forecast for Mountain Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Mostly Sunny | 0 mph | 0% |
| Tonight | 62°F | Mostly Cloudy | 0 mph | 1% |
| Wednesday | 81°F | Partly Sunny then Chance Showers And Thunderstorms | 0 mph | 50% |
| Wednesday Night | 68°F | Showers And Thunderstorms Likely | 0 mph | 57% |
| Thursday | 86°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 75% |
| Thursday Night | 70°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 5 mph SW | 75% |
| Friday | 86°F | Mostly Sunny then Showers And Thunderstorms Likely | 0 to 5 mph SW | 57% |
| Friday Night | 68°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 mph | 57% |
| Saturday | 85°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 53% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 53% |
| Sunday | 86°F | Mostly Sunny | 0 to 5 mph W | 12% |
| Sunday Night | 68°F | Mostly Clear | 0 to 5 mph W | 12% |
| Monday | 87°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 17% |
| Monday Night | 67°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph W | 17% |
Forecast source: National Weather Service (api.weather.gov) for Mountain Lake (40.860, -74.988). Updated through the day.
Growing snapshot for Mountain Lake
Last spring frost
Apr 30
First fall frost
Oct 18
Growing season
168 days
Hardiness zone
6b
More local growing data for Mountain Lake: nearby ZIP 07844 weather · frost dates · planting calendar · New Jersey frost dates
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Climate data from the nearest NOAA station, Belvidere Brg, Nj (8.1 mi from Mountain Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.