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

Hazardous Weather Conditions

Current conditions at

Morristown Airport (KMMU)

Lat: 40.8°NLon: 74.42°WElev: 187ft.

Fog/Mist

28°F

-2°C

Humidity 100%
Wind Speed Calm
Barometer 30.00 in
Dewpoint 28°F (-2°C)
Visibility 4.00 mi
Last update 18 Feb 3:35 am EST
Extended Forecast for

Mountainside NJ

Dense Fog Advisory February 18, 03:48am until February 18, 10:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory February 18, 03:48am until February 18, 10:00am

    NOW until 10:00am Wed

    Dense Fog Advisory

  • Overnight

    Low: 33 °F

    Slight Chance
    Rain and
    Dense Fog

  • Wednesday

    Wednesday: Rain. Widespread dense fog, mainly before 10am. High near 43. Light and variable wind. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 43 °F

    Rain and
    Dense Fog

  • Wednesday Night

    Wednesday Night: Rain, mainly before 10pm. Areas of fog before 4am. Low around 34. Calm wind becoming northeast around 5 mph after midnight. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 34 °F

    Rain and
    Areas Fog
    then Slight
    Chance Rain
    and Areas Fog

  • Thursday

    Thursday: A 20 percent chance of rain after 1pm. Mostly cloudy, with a high near 43. Northeast wind around 6 mph.

    High: 43 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: Rain likely, mainly after 1am. Cloudy, with a low around 34. East wind 5 to 7 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 34 °F

    Chance Rain
    then Rain
    Likely

  • Friday

    Friday: Rain. High near 42. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 42 °F

    Rain

  • Friday Night

    Friday Night: A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Chance Rain

  • Saturday

    Saturday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

Detailed Forecast

Overnight
A 20 percent chance of rain after 4am. Widespread dense fog. Otherwise, cloudy, with a low around 33. Calm wind.
Wednesday
Rain. Widespread dense fog, mainly before 10am. High near 43. Light and variable wind. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain, mainly before 10pm. Areas of fog before 4am. Low around 34. Calm wind becoming northeast around 5 mph after midnight. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
A 20 percent chance of rain after 1pm. Mostly cloudy, with a high near 43. Northeast wind around 6 mph.
Thursday Night
Rain likely, mainly after 1am. Cloudy, with a low around 34. East wind 5 to 7 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain. High near 42. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 36.
Saturday
Partly sunny, with a high near 48.
Saturday Night
A chance of rain and snow after 1am. Mostly cloudy, with a low around 32. Chance of precipitation is 30%.
Sunday
Snow likely, mainly after 1pm. Mostly cloudy, with a high near 38. Chance of precipitation is 60%.
Sunday Night
A 50 percent chance of snow. Cloudy, with a low around 29.
Monday
A 30 percent chance of snow. Partly sunny, with a high near 38.
Monday Night
Partly cloudy, with a low around 22.
Tuesday
Sunny, with a high near 32.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mountainside NJ
 40.66°N 74.35°W (Elev. 141 ft)
Last Update:
1:31 am EST Feb 18, 2026
Forecast Valid:
3am EST Feb 18, 2026-6pm EST Feb 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation