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

93°F

34°C

Humidity 50%
Wind Speed Calm
Barometer 29.84 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index101°F (38°C)
Last update 18 Aug 5:35 pm EDT
Extended Forecast for

4 Miles S Garner NC

Heat Advisory August 18, 05:52pm until August 18, 08:00pm
Click here for hazard details and duration
...
  •  
    Heat Advisory August 18, 05:52pm until August 18, 08:00pm

    NOW until 8:00pm Tue

    Heat Advisory

  • Tonight

    Low: 73 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 93. Heat index values as high as 100. Light and variable 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 95. Heat index values as high as 103. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 95 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 5am, then a chance of showers. Mostly cloudy, with a low around 72. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 72 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers before 8am, then a chance of showers and thunderstorms between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 89. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 89 °F

    Chance
    T-storms then
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 70. Chance of precipitation is 80%.

    Low: 70 °F

    Showers

  • Saturday

    Saturday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 86. Chance of precipitation is 70%.

    High: 86 °F

    Chance
    Showers then
    Showers
    Likely

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms between 7pm and 8pm. Mostly clear, with a low around 73. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 93. Heat index values as high as 100. Light and variable 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 95. Heat index values as high as 103. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and thunderstorms likely before 5am, then a chance of showers. Mostly cloudy, with a low around 72. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A chance of showers before 8am, then a chance of showers and thunderstorms between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 89. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 70. Chance of precipitation is 80%.
Saturday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 86. Chance of precipitation is 70%.
Saturday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Sunday
Mostly sunny, with a high near 88.
Sunday Night
Partly cloudy, with a low around 67.
Monday
Sunny, with a high near 87.
Monday Night
Mostly clear, with a low around 68.
Tuesday
Mostly sunny, with a high near 89.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Garner NC
 35.64°N 78.65°W (Elev. 354 ft)
Last Update:
2:26 pm EDT Aug 18, 2026
Forecast Valid:
5pm EDT Aug 18, 2026-6pm EDT Aug 25, 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