Old Spiro Lake Weather Forecast

    • 75
    • 103

    Isolated Thunderstorms

    • 74
    • 104

    Hot

    • 76
    • 104

    Chance Thunderstorms

    • 73
    • 95

    Chance Thunderstorms

    • 73
    • 98

    Slight Chance Rain Showers

    • 74
    • 99

    Slight Chance Thunderstorms

Today 7 Sep Northern Le Flore

Sunny. Isolated Showers and Thunderstorms in the afternoon. Hot with Highs around 103. Southeast Winds 5 to 10 Mph. Chance of rain 20 percent. Heat index Values up to 109.

Tonight 7 Sep Northern Le Flore

Mostly clear. Lows in the mid 70s. East Winds 5 to 10 Mph.

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Old Spiro Lake Temperature Statistics

September Temperature

Fort Smith Regional Airport (14.9 miles)

  • Lowest 2 September, 2026

    75.7 °F

  • Average September

    90.7 °F

  • Highest 1 September, 2026

    105.7 °F

Climate (2021–2026)

Fort Smith Regional Airport (14.9 miles)

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  • Average Low 2021–2026

    54.3 °F

  • Average 2021–2026

    65 °F

  • Average High 2021–2026

    76.5 °F
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