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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Chatham NJ

  • Overnight

    Overnight: Mostly cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers, with thunderstorms also possible after 5pm. High near 72. South wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 72 °F

    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before midnight, then a slight chance of showers after 5am. Low around 56. South wind around 5 mph becoming north after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 56 °F

    Showers then
    Mostly Cloudy

  • Monday

    Monday: A slight chance of showers before 7am, then a slight chance of showers after 2pm. Increasing clouds, with a high near 68. North wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 68 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers before 8pm, then a chance of showers after 2am. Mostly cloudy, with a low around 52. Northeast wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 52 °F

    Mostly Cloudy
    then Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers. Mostly cloudy, with a high near 64. Chance of precipitation is 30%. New precipitation amounts between a quarter and half of an inch possible.

    High: 64 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 64.

    High: 64 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 58. Calm wind.
Sunday
Showers, with thunderstorms also possible after 5pm. High near 72. South wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers and possibly a thunderstorm before midnight, then a slight chance of showers after 5am. Low around 56. South wind around 5 mph becoming north after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
A slight chance of showers before 7am, then a slight chance of showers after 2pm. Increasing clouds, with a high near 68. North wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Monday Night
A slight chance of showers before 8pm, then a chance of showers after 2am. Mostly cloudy, with a low around 52. Northeast wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
A chance of showers. Mostly cloudy, with a high near 64. Chance of precipitation is 30%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Mostly cloudy, with a low around 50.
Wednesday
Mostly cloudy, with a high near 64.
Wednesday Night
Mostly cloudy, with a low around 50.
Thursday
A chance of showers after 2pm. Mostly cloudy, with a high near 63. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 50. Chance of precipitation is 40%.
Friday
A chance of showers. Mostly cloudy, with a high near 65. Chance of precipitation is 40%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 51. Chance of precipitation is 30%.
Saturday
A chance of showers. Partly sunny, with a high near 68. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Chatham NJ
 40.74°N 74.39°W (Elev. 256 ft)
Last Update:
4:09 pm EDT Sep 19, 2026
Forecast Valid:
3am EDT Sep 20, 2026-6pm EDT Sep 26, 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