Harnett Weather Forecast

    • 77
    • 98

    Slight Chance Thunderstorms

    • 74
    • 94

    Chance Thunderstorms

    • 69
    • 88

    Chance Thunderstorms

    • 68
    • 89

    Mostly Sunny

    • 71
    • 91

    Mostly Sunny

    • 77
    • 95

    Partly Sunny

Today 20 Jul Harnett

Mostly sunny. Hot with Highs in the upper 90s. West Winds 5 to 10 Mph. Heat index Values up to 109.

Tonight 20 Jul Harnett

Mostly clear. Lows in the upper 70s. Northwest Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Harnett Temperature Statistics

July Temperature

Erwin, Harnett County Airport (3.7 miles)

  • Lowest 5 July, 2025

    69.4 °F

  • Average July

    79.8 °F

  • Highest 7 July, 2025

    94.1 °F

Climate (2020–Present)

Erwin, Harnett County Airport (3.7 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    52.4 °F

  • Average 2020–2025

    62.4 °F

  • Average High 2020–2025

    73.5 °F
Get WillyWeather+ to remove ads