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

Andover, Aeroflex-Andover Airport (K12N)

Lat: 41.01°NLon: 74.74°WElev: 584ft.

42°F

6°C

Humidity 49%
Wind Speed S 3 mph
Barometer 29.81 in (1010.4 mb)
Dewpoint 24°F (-4°C)
Visibility NA
Last update 13 Jan 5:54 pm EST
Extended Forecast for

Hopatcong NJ

  • Tonight

    Tonight: Mostly cloudy, with a low around 35. Southwest wind around 5 mph.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain, mainly after 5pm. Mostly cloudy, with a high near 44. Southwest wind around 5 mph becoming calm in the afternoon. Chance of precipitation is 30%.

    High: 44 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain likely before 10pm, then rain and snow between 10pm and 4am, then snow likely after 4am. Low around 23. South wind 5 to 10 mph becoming northwest after midnight. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    Low: 23 °F

    Rain/Snow

  • Thursday

    Thursday: Snow likely, mainly before 7am. Partly sunny, with a high near 27. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 27 °F

    Snow Likely
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 12. Northwest wind 10 to 15 mph.

    Low: 12 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 22.

    Low: 22 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 38.

    High: 38 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 35. Southwest wind around 5 mph.
Wednesday
A chance of rain, mainly after 5pm. Mostly cloudy, with a high near 44. Southwest wind around 5 mph becoming calm in the afternoon. Chance of precipitation is 30%.
Wednesday Night
Rain likely before 10pm, then rain and snow between 10pm and 4am, then snow likely after 4am. Low around 23. South wind 5 to 10 mph becoming northwest after midnight. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Thursday
Snow likely, mainly before 7am. Partly sunny, with a high near 27. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday Night
Partly cloudy, with a low around 12. Northwest wind 10 to 15 mph.
Friday
Mostly sunny, with a high near 28.
Friday Night
Mostly cloudy, with a low around 22.
Saturday
Partly sunny, with a high near 38.
Saturday Night
Mostly cloudy, with a low around 20.
Sunday
Partly sunny, with a high near 28.
Sunday Night
Mostly cloudy, with a low around 15.
M.L.King Day
Partly sunny, with a high near 26.
Monday Night
Mostly cloudy, with a low around 14.
Tuesday
Partly sunny, with a high near 21.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hopatcong NJ
 40.95°N 74.67°W (Elev. 1096 ft)
Last Update:
4:12 pm EST Jan 13, 2026
Forecast Valid:
6pm EST Jan 13, 2026-6pm EST Jan 20, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation