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

Briefing for Heat, Severe Storm, and Flash Flood Risks through Thursday

Dangerously hot and humid conditions are expected through Wednesday. There is also a threat of isolated severe thunderstorms on Wednesday. Flash flooding from locally heavy rainfall is possible on Thursday. See this briefing for details on these hazards. Read More >

Hazardous Weather Conditions

Current conditions at

Sussex, Sussex Airport (KFWN)

Lat: 41.2°NLon: 74.63°WElev: 410ft.

Fair

85°F

29°C

Humidity 72%
Wind Speed SE 5 mph
Barometer 30.03 in (1016.6 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 29 Jul 9:53 am EDT
Extended Forecast for

Sussex Airport NJ

Heat Advisory July 29, 11:00am until July 30, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Sunny and hot, with a high near 97. Heat index values as high as 100. Calm wind becoming west around 5 mph in the afternoon.

    High: 97 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 70. Calm wind.

    Low: 70 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 95. Heat index values as high as 101. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 95 °F

    Sunny then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Calm wind. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 70 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 81. Northeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 81 °F

    Chance
    Showers then
    Heavy Rain

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Cloudy, with a low around 63. Chance of precipitation is 70%. New rainfall amounts between 1 and 2 inches possible.

    Low: 63 °F

    Heavy Rain

  • Friday

    Friday: Showers likely, mainly before 8am. Mostly cloudy, with a high near 75. Chance of precipitation is 60%.

    High: 75 °F

    Showers
    Likely then
    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

Detailed Forecast

Today
Sunny and hot, with a high near 97. Heat index values as high as 100. Calm wind becoming west around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 70. Calm wind.
Wednesday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 95. Heat index values as high as 101. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Calm wind. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 81. Northeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Cloudy, with a low around 63. Chance of precipitation is 70%. New rainfall amounts between 1 and 2 inches possible.
Friday
Showers likely, mainly before 8am. Mostly cloudy, with a high near 75. Chance of precipitation is 60%.
Friday Night
Partly cloudy, with a low around 57.
Saturday
Sunny, with a high near 79.
Saturday Night
Mostly clear, with a low around 55.
Sunday
Sunny, with a high near 83.
Sunday Night
Mostly clear, with a low around 58.
Monday
Mostly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sussex Airport NJ
 41.21°N 74.62°W (Elev. 407 ft)
Last Update:
4:11 am EDT Jul 29, 2025
Forecast Valid:
10am EDT Jul 29, 2025-6pm EDT Aug 4, 2025
 
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