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

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

Sussex, Sussex Airport (KFWN)

Lat: 41.2°NLon: 74.63°WElev: 410ft.

Fog

49°F

9°C

Humidity 90%
Wind Speed Calm
Barometer 29.77 in (1007.9 mb)
Dewpoint 46°F (8°C)
Visibility 0.25 mi
Last update 21 Mar 4:53 am EDT
Extended Forecast for

Sussex NJ

Dense Fog Advisory until March 21, 08:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until March 21, 08:00am

    NOW until 8:00am Sat

    Dense Fog Advisory

  • Overnight

    Low: 40 °F

    Areas Dense
    Fog

  • Saturday

    Saturday: Areas of dense fog before 8am. Otherwise, mostly sunny, with a high near 56. North wind around 10 mph, with gusts as high as 20 mph.

    High: 56 °F

    Areas Dense
    Fog then
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 38. Calm wind becoming northeast around 5 mph after midnight.

    Low: 38 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of showers after 2pm. Mostly cloudy, with a high near 66. South wind 5 to 10 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 66 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Showers, mainly after 8pm. Low around 37. North wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 37 °F

    Showers

  • Monday

    Monday: A chance of rain and snow showers before 11am, then a chance of rain showers between 11am and 2pm. Partly sunny, with a high near 47. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 47 °F

    Chance
    Rain/Snow
    then Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

Detailed Forecast

Overnight
Areas of dense fog. Otherwise, mostly cloudy, with a low around 40. Northwest wind around 5 mph.
Saturday
Areas of dense fog before 8am. Otherwise, mostly sunny, with a high near 56. North wind around 10 mph, with gusts as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around 38. Calm wind becoming northeast around 5 mph after midnight.
Sunday
A chance of showers after 2pm. Mostly cloudy, with a high near 66. South wind 5 to 10 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Showers, mainly after 8pm. Low around 37. North wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Monday
A chance of rain and snow showers before 11am, then a chance of rain showers between 11am and 2pm. Partly sunny, with a high near 47. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
Mostly clear, with a low around 25.
Tuesday
Sunny, with a high near 49.
Tuesday Night
Mostly cloudy, with a low around 31.
Wednesday
Partly sunny, with a high near 53.
Wednesday Night
Mostly cloudy, with a low around 31.
Thursday
Mostly cloudy, with a high near 52.
Thursday Night
Rain likely. Mostly cloudy, with a low around 35. Chance of precipitation is 60%.
Friday
A chance of rain. Partly sunny, with a high near 50. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sussex NJ
 41.21°N 74.62°W (Elev. 407 ft)
Last Update:
4:09 am EDT Mar 21, 2026
Forecast Valid:
5am EDT Mar 21, 2026-6pm EDT Mar 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