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

Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Current conditions at

Somerville, Somerset Airport (KSMQ)

Lat: 40.62°NLon: 74.67°WElev: 105ft.

Overcast

68°F

20°C

Humidity 93%
Wind Speed Calm
Barometer 29.87 in (1011.4 mb)
Dewpoint 66°F (19°C)
Visibility 9.00 mi
Last update 23 Aug 1:53 am EDT
Extended Forecast for

Raritan NJ

  • Overnight

    Overnight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 65. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Showers
    Likely and
    Patchy Fog

  • Sunday

    Sunday: A chance of showers and thunderstorms, mainly before 1pm. Patchy fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 84. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Chance
    Showers and
    Patchy Fog

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 59. West wind around 5 mph becoming calm.

    Low: 59 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 81. Light west wind increasing to 5 to 10 mph in the afternoon.

    High: 81 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 57. Calm wind.

    Low: 57 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

Detailed Forecast

Overnight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 65. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers and thunderstorms, mainly before 1pm. Patchy fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 84. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Mostly clear, with a low around 59. West wind around 5 mph becoming calm.
Monday
Sunny, with a high near 81. Light west wind increasing to 5 to 10 mph in the afternoon.
Monday Night
Mostly clear, with a low around 57. Calm wind.
Tuesday
Sunny, with a high near 82.
Tuesday Night
Mostly clear, with a low around 59.
Wednesday
Sunny, with a high near 85.
Wednesday Night
Partly cloudy, with a low around 63.
Thursday
A chance of showers after 8am. Partly sunny, with a high near 85. Chance of precipitation is 40%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 50%.
Friday
A chance of showers. Partly sunny, with a high near 85. Chance of precipitation is 40%.
Friday Night
A chance of showers. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Raritan NJ
 40.56°N 74.63°W (Elev. 69 ft)
Last Update:
7:53 pm EDT Aug 22, 2026
Forecast Valid:
2am EDT Aug 23, 2026-6pm EDT Aug 29, 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