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.

32°F

0°C

Humidity 92%
Wind Speed Calm
Barometer 30.09 in (1019.5 mb)
Dewpoint 30°F (-1°C)
Visibility NA
Last update 20 Apr 4:54 am EDT
Extended Forecast for

4 Miles NE Lake Hopatcong NJ

Frost Advisory April 20, 05:51am until April 20, 08:00am
Freeze Warning April 21, 12:00am until April 21, 09:00am
Click here for hazard details and duration
...
Freeze Warning
  •  
    Frost Advisory April 20, 05:51am until April 20, 08:00am

    NOW until 8:00am Mon

    Frost Advisory

  • Today

    High: 45 °F

    Slight Chance
    Snow Showers
    then Mostly
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 26. Northwest wind around 5 mph.

    Low: 26 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 50. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 50 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers, mainly after 2am. Increasing clouds, with a low around 38. South wind around 5 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, mainly before 8am. Mostly cloudy, with a high near 59. South wind around 5 mph becoming southwest in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 59 °F

    Chance
    Showers

  • Wednesday Night

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

    Low: 41 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Thursday Night

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

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Today
A slight chance of snow showers between 7am and 8am. Patchy frost before 8am. Otherwise, mostly sunny, with a high near 45. Northwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 26. Northwest wind around 5 mph.
Tuesday
Sunny, with a high near 50. Calm wind becoming southwest around 5 mph in the afternoon.
Tuesday Night
A chance of showers, mainly after 2am. Increasing clouds, with a low around 38. South wind around 5 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A chance of showers, mainly before 8am. Mostly cloudy, with a high near 59. South wind around 5 mph becoming southwest in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Partly cloudy, with a low around 41.
Thursday
Mostly sunny, with a high near 65.
Thursday Night
Partly cloudy, with a low around 43.
Friday
Mostly sunny, with a high near 64.
Friday Night
A chance of showers. Mostly cloudy, with a low around 43. Chance of precipitation is 30%.
Saturday
A chance of showers. Partly sunny, with a high near 57. Chance of precipitation is 40%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 41. Chance of precipitation is 50%.
Sunday
A chance of showers. Partly sunny, with a high near 58. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NE Lake Hopatcong NJ
 41°N 74.57°W (Elev. 1115 ft)
Last Update:
4:10 am EDT Apr 20, 2026
Forecast Valid:
5am EDT Apr 20, 2026-6pm EDT Apr 26, 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