Fort Smith Weather Forecast

    • 77
    • 101

    Slight Chance Thunderstorms

    • 77
    • 102

    Slight Chance Thunderstorms

    • 76
    • 100

    Hot

    • 75
    • 100

    Hot

    • 75
    • 99

    Slight Chance Thunderstorms

    • 71
    • 93

    Chance Rain Showers

Today 16 Sep North and Central Sebastian

Mostly sunny. A slight chance of Showers and Thunderstorms this afternoon. Hot with Highs around 100. South Winds around 5 Mph. Chance of rain 20 percent. Heat index Values up to 108.

Tonight 16 Sep North and Central Sebastian

Mostly clear. Lows in the mid 70s. Southeast Winds around 5 Mph.

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Fort Smith Temperature Statistics

September Temperature

Fort Smith Regional Airport (3.7 miles)

  • Lowest 11 September, 2026

    74.6 °F

  • Average September

    90.1 °F

  • Highest 4 September, 2026

    106.6 °F

Climate (2021–2026)

Fort Smith Regional Airport (3.7 miles)

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  • Average Low 2021–2026

    54.4 °F

  • Average 2021–2026

    65.1 °F

  • Average High 2021–2026

    76.6 °F
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