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

Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Current conditions at

Somerville, Somerset Airport (KSMQ)

Lat: 40.62°NLon: 74.67°WElev: 105ft.

A Few Clouds

68°F

20°C

Humidity 93%
Wind Speed S 3 mph
Barometer 29.71 in (1006.1 mb)
Dewpoint 66°F (19°C)
Visibility 8.00 mi
Last update 18 Jun 3:53 am EDT
Extended Forecast for

Annandale NJ

  • Today

    Today: Showers likely, with thunderstorms also possible after 2pm. Cloudy through mid morning, then gradual clearing, with a high near 88. Breezy, with a southeast wind 5 to 10 mph becoming southwest 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    Showers
    Likely and
    Breezy

  • Tonight

    Tonight: Increasing clouds, with a low around 64. West wind 5 to 10 mph, with gusts as high as 25 mph.

    Low: 64 °F

    Increasing
    Clouds

  • Juneteenth

    Juneteenth: Cloudy through mid morning, then gradual clearing, with a high near 82. West wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 82 °F

    Gradual
    Clearing

  • Friday Night

    Friday Night: Clear, with a low around 59. West wind around 5 mph.

    Low: 59 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 81. West wind 10 to 15 mph.

    High: 81 °F

    Sunny

  • Saturday Night

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

    Low: 57 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers after 2am. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.

    Low: 61 °F

    Partly Cloudy
    then Chance
    Showers

  • Monday

    Monday: Showers, with thunderstorms also possible after 2pm. High near 78. Chance of precipitation is 80%.

    High: 78 °F

    Showers

Detailed Forecast

Today
Showers likely, with thunderstorms also possible after 2pm. Cloudy through mid morning, then gradual clearing, with a high near 88. Breezy, with a southeast wind 5 to 10 mph becoming southwest 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Increasing clouds, with a low around 64. West wind 5 to 10 mph, with gusts as high as 25 mph.
Juneteenth
Cloudy through mid morning, then gradual clearing, with a high near 82. West wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Clear, with a low around 59. West wind around 5 mph.
Saturday
Sunny, with a high near 81. West wind 10 to 15 mph.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Mostly sunny, with a high near 83.
Sunday Night
A chance of showers after 2am. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.
Monday
Showers, with thunderstorms also possible after 2pm. High near 78. Chance of precipitation is 80%.
Monday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 58. Chance of precipitation is 50%.
Tuesday
Mostly sunny, with a high near 81.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Mostly sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Annandale NJ
 40.64°N 74.88°W (Elev. 299 ft)
Last Update:
4:08 am EDT Jun 18, 2026
Forecast Valid:
4am EDT Jun 18, 2026-6pm EDT Jun 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation