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

Severe Weather and Heavy Rainfall in the Ohio Valley; Heat Continuing in the South and Southeast

Severe thunderstorms with damaging wind gusts will be possible from the mid-Mississippi Valley into parts of the Ohio Valley and central Appalachians tonight. Heavy rain associated with these storms may lead to considerable flash and urban flooding impacts across portions of the Ohio Valley. Mid-summer heat persists from the Central Plains to the Southeast. Read More >

Current conditions at

Somerville, Somerset Airport (KSMQ)

Lat: 40.62°NLon: 74.67°WElev: 105ft.

Fair

73°F

23°C

Humidity 90%
Wind Speed Calm
Barometer 29.83 in (1009.8 mb)
Dewpoint 70°F (21°C)
Visibility 8.00 mi
Last update 11 Aug 9:53 pm EDT
Extended Forecast for

Raritan NJ

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 64. Calm wind. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, mainly before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 86. Calm wind becoming north around 5 mph. Chance of precipitation is 30%. New precipitation amounts between a quarter and half of an inch possible.

    High: 86 °F

    Chance
    Showers then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers after 2am. Partly cloudy, with a low around 66. Calm wind. Chance of precipitation is 20%.

    Low: 66 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 86. Calm wind becoming west around 5 mph in the afternoon.

    High: 86 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers before 2am. Mostly cloudy, with a low around 67. West wind around 5 mph becoming calm. Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 64. Calm wind. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
A chance of showers, mainly before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 86. Calm wind becoming north around 5 mph. Chance of precipitation is 30%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday Night
A slight chance of showers after 2am. Partly cloudy, with a low around 66. Calm wind. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 86. Calm wind becoming west around 5 mph in the afternoon.
Thursday Night
A slight chance of showers before 2am. Mostly cloudy, with a low around 67. West wind around 5 mph becoming calm. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 83.
Friday Night
Mostly clear, with a low around 57.
Saturday
Sunny, with a high near 83.
Saturday Night
Partly cloudy, with a low around 58.
Sunday
A chance of showers after 2pm. Mostly sunny, with a high near 84. Chance of precipitation is 30%.
Sunday Night
Showers likely. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
Monday
A chance of showers. Partly sunny, with a high near 84. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 62.
Tuesday
Sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Raritan NJ
 40.57°N 74.66°W (Elev. 102 ft)
Last Update:
4:09 pm EDT Aug 11, 2026
Forecast Valid:
10pm EDT Aug 11, 2026-6pm EDT Aug 18, 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