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

Somerville, Somerset Airport (KSMQ)

Lat: 40.62°NLon: 74.67°WElev: 105ft.

Overcast

73°F

23°C

Humidity 71%
Wind Speed NW 5 mph
Barometer 30.08 in (1018.6 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 18 Sep 9:53 am EDT
Extended Forecast for

Spotswood NJ

  • Today

    Today: Mostly sunny, with a high near 83. North wind around 5 mph.

    High: 83 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 57. Northeast wind 5 to 10 mph.

    Low: 57 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 73. Northeast wind 5 to 10 mph.

    High: 73 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 59. East wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers, mainly after 2pm. High near 72. Southeast wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 72 °F

    Chance
    Showers then
    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 2am, then showers likely. Low around 61. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    Low: 61 °F

    Showers

  • Monday

    Monday: Showers likely, mainly before 8am. Mostly cloudy, with a high near 69. Chance of precipitation is 60%.

    High: 69 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A chance of showers. Mostly cloudy, with a low around 56. Chance of precipitation is 50%.

    Low: 56 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers. Mostly cloudy, with a high near 64. Chance of precipitation is 50%.

    High: 64 °F

    Chance
    Showers

Detailed Forecast

Today
Mostly sunny, with a high near 83. North wind around 5 mph.
Tonight
Partly cloudy, with a low around 57. Northeast wind 5 to 10 mph.
Saturday
Partly sunny, with a high near 73. Northeast wind 5 to 10 mph.
Saturday Night
Mostly cloudy, with a low around 59. East wind around 5 mph becoming calm in the evening.
Sunday
Showers, mainly after 2pm. High near 72. Southeast wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 61. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Monday
Showers likely, mainly before 8am. Mostly cloudy, with a high near 69. Chance of precipitation is 60%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 56. Chance of precipitation is 50%.
Tuesday
A chance of showers. Mostly cloudy, with a high near 64. Chance of precipitation is 50%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 64. Chance of precipitation is 40%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.
Thursday
A chance of showers. Mostly cloudy, with a high near 66. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Spotswood NJ
 40.4°N 74.4°W (Elev. 75 ft)
Last Update:
4:09 am EDT Sep 18, 2026
Forecast Valid:
10am EDT Sep 18, 2026-6pm EDT Sep 24, 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