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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Sunday could bring areas of flooding to parts of the upper Midwest, central Great Lakes, southern New England and Virginia/North Carolina tidewater region. Read More >

Current conditions at

Allentown, Lehigh Valley International Airport (KABE)

Lat: 40.65°NLon: 75.45°WElev: 384ft.

Fog/Mist

71°F

22°C

Humidity 96%
Wind Speed Calm
Barometer 30.08 in (1018.4 mb)
Dewpoint 70°F (21°C)
Visibility 5.00 mi
Last update 17 Sep 11:51 pm EDT
Extended Forecast for

Stewartsville NJ

  • Overnight

    Overnight: A slight chance of showers before 2am. Mostly cloudy, with a low around 65. Calm wind. Chance of precipitation is 20%.

    Low: 65 °F

    Slight Chance
    Showers

  • Friday

    Friday: Sunny, with a high near 80. North wind around 5 mph.

    High: 80 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 54. North wind around 5 mph.

    Low: 54 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 73. Northeast wind around 5 mph becoming east in the afternoon.

    High: 73 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Showers likely after 2am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 58. Southeast wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 58 °F

    Mostly Cloudy
    then Showers
    Likely and
    Patchy Fog

  • Sunday

    Sunday: Showers, with thunderstorms also possible after 2pm. Patchy fog before 11am. High near 69. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    High: 69 °F

    Showers and
    Patchy Fog

  • Sunday Night

    Sunday Night: Showers likely, mainly before 2am. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.

    Low: 58 °F

    Showers
    Likely

  • Monday

    Monday: A chance of showers. Mostly cloudy, with a high near 68. Chance of precipitation is 40%.

    High: 68 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.

    Low: 53 °F

    Chance
    Showers

Detailed Forecast

Overnight
A slight chance of showers before 2am. Mostly cloudy, with a low around 65. Calm wind. Chance of precipitation is 20%.
Friday
Sunny, with a high near 80. North wind around 5 mph.
Friday Night
Mostly clear, with a low around 54. North wind around 5 mph.
Saturday
Mostly sunny, with a high near 73. Northeast wind around 5 mph becoming east in the afternoon.
Saturday Night
Showers likely after 2am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 58. Southeast wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Showers, with thunderstorms also possible after 2pm. Patchy fog before 11am. High near 69. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Sunday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.
Monday
A chance of showers. Mostly cloudy, with a high near 68. Chance of precipitation is 40%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.
Tuesday
A chance of showers. Mostly cloudy, with a high near 59. Chance of precipitation is 50%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 48. Chance of precipitation is 30%.
Wednesday
A chance of showers. Partly sunny, with a high near 61. Chance of precipitation is 30%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 49. Chance of precipitation is 30%.
Thursday
A chance of showers. Partly sunny, with a high near 63. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Stewartsville NJ
 40.69°N 75.13°W (Elev. 387 ft)
Last Update:
4:09 pm EDT Sep 17, 2026
Forecast Valid:
12am 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