National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Andover, Aeroflex-Andover Airport (K12N)

Lat: 41.01°NLon: 74.74°WElev: 584ft.

26°F

-3°C

Humidity 37%
Wind Speed Vrbl 5 mph
Barometer 30.02 in (1018.2 mb)
Dewpoint 3°F (-16°C)
Visibility NA
Wind Chill20°F (-7°C)
Last update 19 Jan 8:54 pm EST
Extended Forecast for

Lake Hopatcong NJ

Cold Weather Advisory January 20, 02:00am until January 20, 10:00am
Click here for hazard details and duration
Cold Weather Advisory

  • Tonight

    Tonight: Mostly clear, with a low around 8. Wind chill values as low as -3. West wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 8 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 17. Wind chill values as low as -5. West wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 17 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 6. Wind chill values as low as -1. West wind around 5 mph.

    Low: 6 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 27. Wind chill values as low as -1. Light southwest wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 27 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 24. Southwest wind around 5 mph, with gusts as high as 20 mph.

    Low: 24 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 38.

    High: 38 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 26.

    High: 26 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 6.

    Low: 6 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 8. Wind chill values as low as -3. West wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday
Sunny, with a high near 17. Wind chill values as low as -5. West wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 6. Wind chill values as low as -1. West wind around 5 mph.
Wednesday
Mostly sunny, with a high near 27. Wind chill values as low as -1. Light southwest wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Wednesday Night
Mostly cloudy, with a low around 24. Southwest wind around 5 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 38.
Thursday Night
Partly cloudy, with a low around 18.
Friday
Partly sunny, with a high near 26.
Friday Night
Mostly cloudy, with a low around 6.
Saturday
Partly sunny, with a high near 13.
Saturday Night
Mostly cloudy, with a low around 4.
Sunday
A chance of snow. Partly sunny, with a high near 13. Chance of precipitation is 30%.
Sunday Night
A chance of snow. Partly cloudy, with a low around 4. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 18.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake Hopatcong NJ
 40.94°N 74.61°W (Elev. 928 ft)
Last Update:
4:10 pm EST Jan 19, 2026
Forecast Valid:
9pm EST Jan 19, 2026-6pm EST Jan 26, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation