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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Andover, Aeroflex-Andover Airport (K12N)

Lat: 41.01°NLon: 74.74°WElev: 584ft.

66°F

19°C

Humidity 96%
Wind Speed Calm
Barometer 29.92 in (1012.8 mb)
Dewpoint 65°F (18°C)
Visibility NA
Last update 20 Sep 3:54 pm EDT
Extended Forecast for

Hopatcong NJSimilar City Names

  • This Afternoon

    This Afternoon: Rain, with thunderstorms also possible after 5pm. High near 65. South wind around 5 mph becoming calm. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 65 °F

    Rain

  • Tonight

    Tonight: Rain and possibly a thunderstorm before 10pm, then a slight chance of rain between 10pm and 11pm. Low around 53. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 53 °F

    Rain then
    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 66. North wind around 5 mph, with gusts as high as 20 mph.

    High: 66 °F

    Partly Sunny

  • Monday Night

    Monday Night: A chance of showers. Mostly cloudy, with a low around 47. Calm wind becoming northeast around 5 mph after midnight. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 47 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers. Mostly cloudy, with a high near 60. Northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 60 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers. Mostly cloudy, with a low around 45. Chance of precipitation is 20%.

    Low: 45 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers before 2pm. Mostly cloudy, with a high near 61. Chance of precipitation is 30%.

    High: 61 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers after 8am. Mostly cloudy, with a high near 61. Chance of precipitation is 30%.

    High: 61 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Rain, with thunderstorms also possible after 5pm. High near 65. South wind around 5 mph becoming calm. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Rain and possibly a thunderstorm before 10pm, then a slight chance of rain between 10pm and 11pm. Low around 53. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
Partly sunny, with a high near 66. North wind around 5 mph, with gusts as high as 20 mph.
Monday Night
A chance of showers. Mostly cloudy, with a low around 47. Calm wind becoming northeast around 5 mph after midnight. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
A chance of showers. Mostly cloudy, with a high near 60. Northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
A slight chance of showers. Mostly cloudy, with a low around 45. Chance of precipitation is 20%.
Wednesday
A chance of showers before 2pm. Mostly cloudy, with a high near 61. Chance of precipitation is 30%.
Wednesday Night
Mostly cloudy, with a low around 46.
Thursday
A chance of showers after 8am. Mostly cloudy, with a high near 61. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 46. Chance of precipitation is 30%.
Friday
A chance of showers. Partly sunny, with a high near 61. Chance of precipitation is 30%.
Friday Night
Mostly cloudy, with a low around 47.
Saturday
Mostly sunny, with a high near 66.
Saturday Night
Mostly cloudy, with a low around 48.
Sunday
Partly sunny, with a high near 68.
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ABOUT THIS FORECAST

 
Point Forecast:
Hopatcong NJSimilar City Names
 40.97°N 74.67°W (Elev. 1030 ft)
Last Update:
4:09 am EDT Sep 20, 2026
Forecast Valid:
4pm EDT Sep 20, 2026-6pm EDT Sep 27, 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