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

Morristown Airport (KMMU)

Lat: 40.8°NLon: 74.42°WElev: 187ft.

Drizzle

48°F

9°C

Humidity 100%
Wind Speed Calm
Barometer 29.85 in
Dewpoint 48°F (9°C)
Visibility 3.00 mi
Last update 16 Mar 5:15 am EDT
Extended Forecast for

Mountainside NJ

  • Overnight

    Overnight: Showers and possibly a thunderstorm. Areas of fog. Steady temperature around 50. Southeast wind around 16 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 50 °F

    Showers and
    Areas Fog

  • Monday

    Monday: Showers and possibly a thunderstorm. Areas of fog. High near 65. Breezy, with a south wind 14 to 20 mph, with gusts as high as 39 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 65 °F

    Showers and
    Areas Fog

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Areas of fog before 11pm. Low around 33. Breezy, with a south wind 18 to 24 mph becoming west after midnight. Winds could gust as high as 41 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 33 °F

    Showers and
    Areas Fog

  • Tuesday

    Tuesday: Mostly sunny, with a high near 40. Wind chill values between 20 and 30. West wind around 16 mph, with gusts as high as 30 mph.

    High: 40 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 25. West wind 7 to 13 mph.

    Low: 25 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Increasing clouds, with a high near 39.

    High: 39 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 47.

    High: 47 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Areas of fog. Steady temperature around 50. Southeast wind around 16 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
Showers and possibly a thunderstorm. Areas of fog. High near 65. Breezy, with a south wind 14 to 20 mph, with gusts as high as 39 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers and possibly a thunderstorm. Areas of fog before 11pm. Low around 33. Breezy, with a south wind 18 to 24 mph becoming west after midnight. Winds could gust as high as 41 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
Mostly sunny, with a high near 40. Wind chill values between 20 and 30. West wind around 16 mph, with gusts as high as 30 mph.
Tuesday Night
Partly cloudy, with a low around 25. West wind 7 to 13 mph.
Wednesday
Increasing clouds, with a high near 39.
Wednesday Night
Mostly cloudy, with a low around 28.
Thursday
Partly sunny, with a high near 47.
Thursday Night
Mostly cloudy, with a low around 35.
Friday
Partly sunny, with a high near 55.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 37.
Saturday
A 30 percent chance of rain. Mostly cloudy, with a high near 53.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 36.
Sunday
Partly sunny, with a high near 48.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mountainside NJ
 40.69°N 74.37°W (Elev. 417 ft)
Last Update:
2:29 am EDT Mar 16, 2026
Forecast Valid:
5am EDT Mar 16, 2026-6pm EDT Mar 22, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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