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.

40°F

4°C

Humidity 27%
Wind Speed NW 7 mph
Barometer 30.24 in (1024.9 mb)
Dewpoint 8°F (-13°C)
Visibility NA
Wind Chill35°F (2°C)
Last update 1 Mar 3:54 pm EST
Extended Forecast for

Lake Hopatcong NJ

  • Tonight

    Tonight: Clear, with a low around 12. North wind around 5 mph.

    Low: 12 °F

    Clear

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 31. Calm wind.

    High: 31 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: A slight chance of snow and freezing rain between 1am and 4am, then a slight chance of snow after 4am. Increasing clouds, with a low around 18. South wind around 5 mph becoming calm. Chance of precipitation is 20%.

    Low: 18 °F

    Mostly Clear
    then Slight
    Chance Wintry
    Mix

  • Tuesday

    Tuesday: Rain, snow and freezing rain, possibly mixed with sleet before 1pm, then rain, possibly mixed with snow between 1pm and 4pm, then rain after 4pm. High near 38. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 90%. Little or no ice accumulation expected. New snow and sleet accumulation of less than a half inch possible.

    High: 38 °F

    Wintry Mix

  • Tuesday Night

    Tuesday Night: Rain. Low around 32. South wind around 5 mph becoming west after midnight. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 32 °F

    Rain

  • Wednesday

    Wednesday: A chance of rain. Cloudy, with a high near 49. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 49 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain. Cloudy, with a low around 38. Chance of precipitation is 50%.

    Low: 38 °F

    Chance Rain

  • Thursday

    Thursday: A chance of rain. Cloudy, with a high near 57. Chance of precipitation is 50%.

    High: 57 °F

    Chance Rain

  • Thursday Night

    Thursday Night: Rain likely, mainly after 1am. Cloudy, with a low around 41. Chance of precipitation is 60%.

    Low: 41 °F

    Rain Likely

Detailed Forecast

Tonight
Clear, with a low around 12. North wind around 5 mph.
Monday
Partly sunny, then gradually becoming sunny, with a high near 31. Calm wind.
Monday Night
A slight chance of snow and freezing rain between 1am and 4am, then a slight chance of snow after 4am. Increasing clouds, with a low around 18. South wind around 5 mph becoming calm. Chance of precipitation is 20%.
Tuesday
Rain, snow and freezing rain, possibly mixed with sleet before 1pm, then rain, possibly mixed with snow between 1pm and 4pm, then rain after 4pm. High near 38. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 90%. Little or no ice accumulation expected. New snow and sleet accumulation of less than a half inch possible.
Tuesday Night
Rain. Low around 32. South wind around 5 mph becoming west after midnight. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
A chance of rain. Cloudy, with a high near 49. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A chance of rain. Cloudy, with a low around 38. Chance of precipitation is 50%.
Thursday
A chance of rain. Cloudy, with a high near 57. Chance of precipitation is 50%.
Thursday Night
Rain likely, mainly after 1am. Cloudy, with a low around 41. Chance of precipitation is 60%.
Friday
A chance of rain before 1pm. Cloudy, with a high near 49. Chance of precipitation is 40%.
Friday Night
Mostly cloudy, with a low around 38.
Saturday
A chance of rain. Cloudy, with a high near 61. Chance of precipitation is 30%.
Saturday Night
A chance of rain. Cloudy, with a low around 45. Chance of precipitation is 50%.
Sunday
A chance of rain. Partly sunny, with a high near 59. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lake Hopatcong NJ
 40.94°N 74.61°W (Elev. 928 ft)
Last Update:
4:10 pm EST Mar 1, 2026
Forecast Valid:
4pm EST Mar 1, 2026-6pm EDT Mar 8, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation