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.

Partly Cloudy

54°F

12°C

Humidity 88%
Wind Speed Calm
Barometer 30.18 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 15 Oct 6:45 pm EDT
Extended Forecast for

Mendham NJ

  • Tonight

    Tonight: Showers likely, mainly after 4am. Increasing clouds, with a low around 54. Southeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 54 °F

    Partly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Showers, with thunderstorms also possible after 5pm. High near 73. Southwest wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 73 °F

    Showers then
    Chance
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 4am, then a slight chance of showers after 5am. Low around 43. West wind 5 to 15 mph becoming northwest after midnight. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 43 °F

    Showers then
    Slight Chance
    Showers

  • Saturday

    Saturday: Cloudy, then gradually becoming mostly sunny, with a high near 51. North wind around 15 mph, with gusts as high as 30 mph.

    High: 51 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 33. North wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 33 °F

    Mostly Clear

  • Sunday

    Sunday: Patchy frost before 9am. Otherwise, sunny, with a high near 55.

    High: 55 °F

    Patchy Frost
    then Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 37.

    Low: 37 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

Detailed Forecast

Tonight
Showers likely, mainly after 4am. Increasing clouds, with a low around 54. Southeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Showers, with thunderstorms also possible after 5pm. High near 73. Southwest wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and possibly a thunderstorm before 4am, then a slight chance of showers after 5am. Low around 43. West wind 5 to 15 mph becoming northwest after midnight. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Cloudy, then gradually becoming mostly sunny, with a high near 51. North wind around 15 mph, with gusts as high as 30 mph.
Saturday Night
Mostly clear, with a low around 33. North wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday
Patchy frost before 9am. Otherwise, sunny, with a high near 55.
Sunday Night
Clear, with a low around 37.
Monday
Sunny, with a high near 61.
Monday Night
Mostly clear, with a low around 41.
Tuesday
Mostly sunny, with a high near 65.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Sunny, with a high near 65.
Wednesday Night
Mostly clear, with a low around 43.
Thursday
Sunny, with a high near 62.
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ABOUT THIS FORECAST

 
Point Forecast:
Mendham NJ
 40.76°N 74.59°W (Elev. 600 ft)
Last Update:
4:09 pm EDT Oct 15, 2026
Forecast Valid:
6pm EDT Oct 15, 2026-6pm EDT Oct 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation