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.

49°F

9°C

Humidity 43%
Wind Speed N 9 mph
Barometer 30.23 in (1023.9 mb)
Dewpoint 27°F (-3°C)
Visibility NA
Wind Chill45°F (7°C)
Last update 17 Oct 2:54 pm EDT
Extended Forecast for

Hopatcong NJ

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

  • Tonight

    Tonight: Widespread frost after 1am. Otherwise, mostly clear, with a low around 30. North wind 10 to 15 mph.

    Low: 30 °F

    Mostly Clear
    then Frost

  • Sunday

    Sunday: Widespread frost before 10am. Otherwise, sunny, with a high near 57. North wind around 5 mph becoming east in the afternoon.

    High: 57 °F

    Frost then
    Sunny

  • Sunday Night

    Sunday Night: Areas of frost after 4am. Otherwise, mostly clear, with a low around 35. Calm wind.

    Low: 35 °F

    Clear then
    Areas Frost

  • 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 40. Calm wind.

    Low: 40 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

Detailed Forecast

Tonight
Widespread frost after 1am. Otherwise, mostly clear, with a low around 30. North wind 10 to 15 mph.
Sunday
Widespread frost before 10am. Otherwise, sunny, with a high near 57. North wind around 5 mph becoming east in the afternoon.
Sunday Night
Areas of frost after 4am. Otherwise, mostly clear, with a low around 35. 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 40. Calm wind.
Tuesday
Mostly sunny, with a high near 64.
Tuesday Night
Partly cloudy, with a low around 43.
Wednesday
Sunny, with a high near 61.
Wednesday Night
Partly cloudy, with a low around 39.
Thursday
Mostly sunny, with a high near 60.
Thursday Night
Partly cloudy, with a low around 43.
Friday
Mostly sunny, with a high near 63.
Friday Night
Partly cloudy, with a low around 42.
Saturday
Mostly sunny, with a high near 59.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hopatcong NJ
 40.97°N 74.67°W (Elev. 1030 ft)
Last Update:
11:43 am EDT Oct 17, 2026
Forecast Valid:
3pm EDT Oct 17, 2026-6pm EDT Oct 24, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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