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

Hazardous Weather Conditions

Current conditions at

Smithfield, Johnston County Airport (KJNX)

Lat: 35.54°NLon: 78.39°WElev: 164ft.

Fair

77°F

25°C

Humidity 100%
Wind Speed Calm
Barometer 29.87 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 17 Aug 10:15 pm EDT
Extended Forecast for

Clayton NC

Heat Advisory August 18, 11:00am until August 18, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 2am. Partly cloudy, with a low around 75. Calm wind. Chance of precipitation is 20%.

    Low: 75 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: Sunny, with a high near 93. Heat index values as high as 102. Northwest wind 3 to 6 mph.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 73. Light north wind.

    Low: 73 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 93. Heat index values as high as 101. Light northeast wind.

    High: 93 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 73. Calm wind.

    Low: 73 °F

    Mostly Clear

  • Thursday

    Thursday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 96. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 96 °F

    Sunny then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 72. Chance of precipitation is 60%.

    Low: 72 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 89. Chance of precipitation is 70%.

    High: 89 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 70. Chance of precipitation is 90%.

    Low: 70 °F

    Showers

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 2am. Partly cloudy, with a low around 75. Calm wind. Chance of precipitation is 20%.
Tuesday
Sunny, with a high near 93. Heat index values as high as 102. Northwest wind 3 to 6 mph.
Tuesday Night
Mostly clear, with a low around 73. Light north wind.
Wednesday
Sunny, with a high near 93. Heat index values as high as 101. Light northeast wind.
Wednesday Night
Mostly clear, with a low around 73. Calm wind.
Thursday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 96. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 72. Chance of precipitation is 60%.
Friday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 89. Chance of precipitation is 70%.
Friday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 70. Chance of precipitation is 90%.
Saturday
A chance of showers before 8am, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 60%.
Saturday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 68. Chance of precipitation is 30%.
Monday
Sunny, with a high near 87.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Clayton NC
 35.64°N 78.45°W (Elev. 299 ft)
Last Update:
8:42 pm EDT Aug 17, 2026
Forecast Valid:
10pm EDT Aug 17, 2026-6pm EDT Aug 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