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

Smithfield, Johnston County Airport (KJNX)

Lat: 35.54°NLon: 78.39°WElev: 164ft.

Fair

81°F

27°C

Humidity 45%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 24 Jun 7:56 pm EDT
Extended Forecast for

Smithfield, Johnston County Airport NC

  • Tonight

    Tonight: Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 90. Calm wind becoming south around 6 mph in the afternoon.

    High: 90 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 68. Calm wind becoming south around 6 mph after midnight.

    Low: 68 °F

    Mostly Clear

  • Friday

    Friday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 95. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.

    High: 95 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 73. South wind 6 to 8 mph. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 97. Chance of precipitation is 30%.

    High: 97 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 73. Chance of precipitation is 40%.

    Low: 73 °F

    Chance
    T-storms

  • Sunday

    Sunday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94. Chance of precipitation is 30%.

    High: 94 °F

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 69. Chance of precipitation is 30%.

    Low: 69 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 64. Calm wind.
Thursday
Mostly sunny, with a high near 90. Calm wind becoming south around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 68. Calm wind becoming south around 6 mph after midnight.
Friday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 95. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 73. South wind 6 to 8 mph. Chance of precipitation is 30%.
Saturday
A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 97. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 73. Chance of precipitation is 40%.
Sunday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 69. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 67.
Tuesday
Sunny and hot, with a high near 97.
Tuesday Night
Mostly clear, with a low around 70.
Wednesday
Sunny and hot, with a high near 100.
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ABOUT THIS FORECAST

 
Point Forecast:
Smithfield, Johnston County Airport NC
 35.54°N 78.38°W (Elev. 200 ft)
Last Update:
2:15 pm EDT Jun 24, 2026
Forecast Valid:
8pm EDT Jun 24, 2026-6pm EDT Jul 1, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation