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.

Fair

27°F

-3°C

Humidity 100%
Wind Speed Calm
Barometer 30.30 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 9 Jan 3:55 am EST
Extended Forecast for

Mountainside NJ

  • Today

    Today: A 40 percent chance of rain after 3pm. Increasing clouds, with a high near 55. Calm wind becoming south 5 to 8 mph in the morning.

    High: 55 °F

    Mostly Sunny
    then Chance
    Rain

  • Tonight

    Tonight: A 40 percent chance of rain before 10pm. Mostly cloudy, with a low around 41. Southwest wind 5 to 7 mph becoming northwest after midnight.

    Low: 41 °F

    Chance Rain
    then Mostly
    Cloudy

  • Saturday

    Saturday: Rain likely, mainly after noon. Cloudy, with a steady temperature around 43. Light and variable wind becoming northeast around 6 mph in the afternoon. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 43 °F

    Chance Rain
    then Rain
    Likely

  • Saturday Night

    Saturday Night: Rain. Low around 39. East wind around 6 mph becoming light and variable. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 39 °F

    Rain then
    Rain Likely

  • Sunday

    Sunday: A chance of rain before noon, then a slight chance of showers after noon. Cloudy, then gradually becoming mostly sunny, with a high near 46. West wind 8 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.

    High: 46 °F

    Chance Rain

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

Detailed Forecast

Today
A 40 percent chance of rain after 3pm. Increasing clouds, with a high near 55. Calm wind becoming south 5 to 8 mph in the morning.
Tonight
A 40 percent chance of rain before 10pm. Mostly cloudy, with a low around 41. Southwest wind 5 to 7 mph becoming northwest after midnight.
Saturday
Rain likely, mainly after noon. Cloudy, with a steady temperature around 43. Light and variable wind becoming northeast around 6 mph in the afternoon. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.
Saturday Night
Rain. Low around 39. East wind around 6 mph becoming light and variable. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
A chance of rain before noon, then a slight chance of showers after noon. Cloudy, then gradually becoming mostly sunny, with a high near 46. West wind 8 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 29.
Monday
Mostly sunny, with a high near 40.
Monday Night
Partly cloudy, with a low around 31.
Tuesday
Mostly sunny, with a high near 45.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
Mostly cloudy, with a high near 46.
Wednesday Night
Mostly cloudy, with a low around 32.
Thursday
A chance of rain and snow showers. Mostly cloudy, with a high near 39. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mountainside NJ
 40.66°N 74.35°W (Elev. 141 ft)
Last Update:
3:06 am EST Jan 9, 2026
Forecast Valid:
4am EST Jan 9, 2026-6pm EST Jan 15, 2026
 
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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