National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Significant Heat in the Northwest U.S.; Tropical Rainfall Potential in the Southwest U.S.

A significant late season heat wave continues in the interior Pacific Northwest for at least one more day before easing somewhat Friday into Saturday. A combination of monsoonal moisture and tropical moisture ahead of tropical cyclone Lorena will bring a marginal to slight risk of excessive rainfall across the southwest U.S. through Saturday which may bring areas of flooding. Read More >

Current conditions at

Andover, Aeroflex-Andover Airport (K12N)

Lat: 41.01°NLon: 74.74°WElev: 584ft.

80°F

27°C

Humidity 47%
Wind Speed NA
Barometer 29.82 in (1009.2 mb)
Dewpoint 58°F (14°C)
Visibility NA
Heat Index81°F (27°C)
Last update 4 Sep 1:54 pm EDT
Extended Forecast for

Lake Hopatcong NJ

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 80. South wind around 10 mph.

    High: 80 °F

    Partly Sunny

  • Tonight

    Tonight: Showers and thunderstorms before 2am, then a slight chance of showers between 2am and 3am. Low around 60. South wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 60 °F

    Showers then
    Chance
    Showers

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 81. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 81 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear

  • Saturday

    Saturday: Showers and possibly a thunderstorm after 2pm. High near 83. Calm wind becoming southwest around 5 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 83 °F

    Mostly Sunny
    then Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 54. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 54 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers before 8am. Partly sunny, with a high near 70. Chance of precipitation is 30%.

    High: 70 °F

    Chance
    Showers then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 80. South wind around 10 mph.
Tonight
Showers and thunderstorms before 2am, then a slight chance of showers between 2am and 3am. Low around 60. South wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 81. Calm wind becoming southwest around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 64. Calm wind.
Saturday
Showers and possibly a thunderstorm after 2pm. High near 83. Calm wind becoming southwest around 5 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 54. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday
A chance of showers before 8am. Partly sunny, with a high near 70. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 50.
Monday
Sunny, with a high near 69.
Monday Night
Mostly clear, with a low around 47.
Tuesday
Sunny, with a high near 72.
Tuesday Night
Mostly clear, with a low around 49.
Wednesday
Mostly sunny, with a high near 73.
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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:
1:39 pm EDT Sep 4, 2025
Forecast Valid:
2pm EDT Sep 4, 2025-6pm EDT Sep 10, 2025
 
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