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 41%
Wind Speed S 10 G 21 mph
Barometer 29.84 in (1011.3 mb)
Dewpoint 20°F (-7°C)
Visibility NA
Wind Chill36°F (2°C)
Last update 13 Mar 4:54 pm EDT
Extended Forecast for

Lake Hopatcong NJ

  • Tonight

    Tonight: A chance of rain and snow, mainly before 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 32. South wind 10 to 15 mph becoming southwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 32 °F

    Chance
    Rain/Snow
    then Mostly
    Clear

  • Saturday

    Saturday: Sunny, with a high near 45. West wind around 15 mph, with gusts as high as 40 mph.

    High: 45 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 29. Northwest wind 5 to 10 mph becoming light after midnight.

    Low: 29 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Cloudy, with a high near 45. Light east wind becoming southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 45 °F

    Cloudy

  • Sunday Night

    Sunday Night: Rain, mainly after 2am. Low around 37. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 37 °F

    Slight Chance
    Rain then
    Rain

  • Monday

    Monday: Showers, with thunderstorms also possible after 2pm. High near 62. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    High: 62 °F

    Showers

  • Monday Night

    Monday Night: Rain showers before 2am, then a chance of rain and snow showers. Some thunder is also possible. Low around 30. Breezy. Chance of precipitation is 90%.

    Low: 30 °F

    Breezy.
    Showers then
    Rain/Snow

  • Tuesday

    Tuesday: A chance of rain and snow showers before 8am. Mostly cloudy, with a high near 38. Chance of precipitation is 30%.

    High: 38 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of rain and snow, mainly before 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 32. South wind 10 to 15 mph becoming southwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Saturday
Sunny, with a high near 45. West wind around 15 mph, with gusts as high as 40 mph.
Saturday Night
Increasing clouds, with a low around 29. Northwest wind 5 to 10 mph becoming light after midnight.
Sunday
Cloudy, with a high near 45. Light east wind becoming southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Sunday Night
Rain, mainly after 2am. Low around 37. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Showers, with thunderstorms also possible after 2pm. High near 62. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Monday Night
Rain showers before 2am, then a chance of rain and snow showers. Some thunder is also possible. Low around 30. Breezy. Chance of precipitation is 90%.
Tuesday
A chance of rain and snow showers before 8am. Mostly cloudy, with a high near 38. Chance of precipitation is 30%.
Tuesday Night
Partly cloudy, with a low around 19.
Wednesday
Partly sunny, with a high near 38.
Wednesday Night
Cloudy, with a low around 25.
Thursday
Mostly cloudy, with a high near 44.
Thursday Night
Mostly cloudy, with a low around 30.
Friday
Mostly cloudy, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake Hopatcong NJ
 40.96°N 74.61°W (Elev. 984 ft)
Last Update:
4:12 pm EDT Mar 13, 2026
Forecast Valid:
5pm EDT Mar 13, 2026-6pm EDT Mar 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation