Fort Smith Weather Forecast

    • 75
    • 100

    Hot

    • 75
    • 100

    Hot

    • 75
    • 99

    Hot

    • 72
    • 96

    Slight Chance Thunderstorms

    • 70
    • 93

    Partly Sunny

    • 71
    • 93

    Partly Sunny

Today 18 Sep North and Central Sebastian

Sunny, hot with Highs around 100. South Winds around 5 Mph.

Tonight 18 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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