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.

51°F

11°C

Humidity 61%
Wind Speed N 8 G 23 mph
Barometer 29.99 in (1015.3 mb)
Dewpoint 38°F (3°C)
Visibility NA
Wind Chill48°F (9°C)
Last update 17 Oct 3:54 am EDT
Extended Forecast for

Lake Hopatcong NJ

Freeze Warning October 18, 01:00am until October 18, 09:00am
Click here for hazard details and duration
Freeze Warning

  • Today

    Today: Cloudy through mid morning, then gradual clearing, with a high near 48. North wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 48 °F

    Gradual
    Clearing

  • Tonight

    Tonight: Widespread frost after 4am. Otherwise, clear, with a low around 31. North wind 5 to 10 mph.

    Low: 31 °F

    Clear then
    Frost

  • Sunday

    Sunday: Widespread frost before 9am. Otherwise, sunny, with a high near 56. North wind around 5 mph becoming calm.

    High: 56 °F

    Frost then
    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 36. Calm wind.

    Low: 36 °F

    Clear

  • Monday

    Monday: Areas of frost before 8am. Otherwise, sunny, with a high near 60. Northeast wind around 5 mph.

    High: 60 °F

    Areas Frost
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

Detailed Forecast

Today
Cloudy through mid morning, then gradual clearing, with a high near 48. North wind 10 to 15 mph, with gusts as high as 30 mph.
Tonight
Widespread frost after 4am. Otherwise, clear, with a low around 31. North wind 5 to 10 mph.
Sunday
Widespread frost before 9am. Otherwise, sunny, with a high near 56. North wind around 5 mph becoming calm.
Sunday Night
Clear, with a low around 36. Calm wind.
Monday
Areas of frost before 8am. Otherwise, sunny, with a high near 60. Northeast wind around 5 mph.
Monday Night
Partly cloudy, with a low around 41.
Tuesday
Mostly sunny, with a high near 64.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Sunny, with a high near 61.
Wednesday Night
Partly cloudy, with a low around 40.
Thursday
Mostly sunny, with a high near 60.
Thursday Night
Partly cloudy, with a low around 44.
Friday
Mostly sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake Hopatcong NJ
 40.98°N 74.6°W (Elev. 997 ft)
Last Update:
4:08 am EDT Oct 17, 2026
Forecast Valid:
4am EDT Oct 17, 2026-6pm EDT Oct 23, 2026
 
Forecast Discussion
 
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Additional Resources

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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