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

75°F

24°C

Humidity 100%
Wind Speed Calm
Barometer 30.00 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Last update 14 Aug 1:15 am EDT
Extended Forecast for

Clayton NC

Heat Advisory August 14, 11:00am until August 14, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Partly cloudy, with a low around 74. Calm wind.

    Low: 74 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 96. Heat index values as high as 106. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 20%.

    High: 96 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 75. Calm wind. Chance of precipitation is 20%.

    Low: 75 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Heat index values as high as 102. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 92 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 74. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 74 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 94.

    High: 94 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 77.

    Low: 77 °F

    Partly Cloudy

  • Monday

    Monday: A chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 99. Chance of precipitation is 30%.

    High: 99 °F

    Sunny then
    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Partly cloudy, with a low around 75. Chance of precipitation is 30%.

    Low: 75 °F

    Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 74. Calm wind.
Friday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 96. Heat index values as high as 106. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 20%.
Friday Night
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 75. Calm wind. Chance of precipitation is 20%.
Saturday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Heat index values as high as 102. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 74. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Mostly sunny, with a high near 94.
Sunday Night
Partly cloudy, with a low around 77.
Monday
A chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 99. Chance of precipitation is 30%.
Monday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Partly cloudy, with a low around 75. Chance of precipitation is 30%.
Tuesday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Chance of precipitation is 50%.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 92. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 73. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 95.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clayton NC
 35.64°N 78.48°W (Elev. 299 ft)
Last Update:
9:26 pm EDT Aug 13, 2026
Forecast Valid:
1am EDT Aug 14, 2026-6pm EDT Aug 20, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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