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.

A Few Clouds

77°F

25°C

Humidity 100%
Wind Speed Calm
Barometer 29.87 in
Dewpoint 77°F (25°C)
Visibility 9.00 mi
Heat Index78°F (26°C)
Last update 17 Aug 11:55 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

  • Overnight

    Overnight: A slight chance of showers after 3am. Partly cloudy, with a low around 75. Light and variable wind. Chance of precipitation is 20%.

    Low: 75 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: Sunny, with a high near 93. Heat index values as high as 102. Northwest wind 3 to 5 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. Calm 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

Overnight
A slight chance of showers after 3am. Partly cloudy, with a low around 75. Light and variable wind. Chance of precipitation is 20%.
Tuesday
Sunny, with a high near 93. Heat index values as high as 102. Northwest wind 3 to 5 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. Calm 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 86. 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
 35.66°N 78.48°W (Elev. 299 ft)
Last Update:
11:56 pm EDT Aug 17, 2026
Forecast Valid:
12am EDT Aug 18, 2026-6pm EDT Aug 24, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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