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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Morristown Airport (KMMU)

Lat: 40.8°NLon: 74.42°WElev: 187ft.

Partly Cloudy

68°F

20°C

Humidity 60%
Wind Speed N 3 mph
Barometer 30.12 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 18 Sep 10:55 pm EDT
Extended Forecast for

Morristown NJ

  • Tonight

    Tonight: Partly cloudy, with a low around 54. North wind around 5 mph.

    Low: 54 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 71. Northeast wind around 5 mph.

    High: 71 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers, mainly after 4am. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 59. Southeast wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 59 °F

    Patchy Fog
    then Chance
    Showers and
    Patchy Fog

  • Sunday

    Sunday: Showers likely, then showers and possibly a thunderstorm after 2pm. Some of the storms could produce heavy rainfall. High near 70. South wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 70 °F

    Heavy Rain

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers. Some of the storms could produce heavy rainfall. Patchy fog. Low around 58. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    Low: 58 °F

    Heavy Rain
    and Patchy
    Fog

  • Monday

    Monday: A chance of showers. Mostly cloudy, with a high near 65. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 65 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 30%.

    Low: 53 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers. Mostly cloudy, with a high near 62. Chance of precipitation is 30%.

    High: 62 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers after 2am. Mostly cloudy, with a low around 50. Chance of precipitation is 30%.

    Low: 50 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 54. North wind around 5 mph.
Saturday
Mostly sunny, with a high near 71. Northeast wind around 5 mph.
Saturday Night
A chance of showers, mainly after 4am. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 59. Southeast wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Showers likely, then showers and possibly a thunderstorm after 2pm. Some of the storms could produce heavy rainfall. High near 70. South wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Some of the storms could produce heavy rainfall. Patchy fog. Low around 58. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Monday
A chance of showers. Mostly cloudy, with a high near 65. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 30%.
Tuesday
A chance of showers. Mostly cloudy, with a high near 62. Chance of precipitation is 30%.
Tuesday Night
A chance of showers after 2am. Mostly cloudy, with a low around 50. Chance of precipitation is 30%.
Wednesday
A chance of showers before 8am. Mostly cloudy, with a high near 61. Chance of precipitation is 30%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 50. Chance of precipitation is 40%.
Thursday
A chance of showers. Mostly cloudy, with a high near 62. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 51. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Morristown NJ
 40.79°N 74.47°W (Elev. 351 ft)
Last Update:
4:10 pm EDT Sep 18, 2026
Forecast Valid:
11pm EDT Sep 18, 2026-6pm EDT Sep 25, 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