Rock Island Weather Forecast

    • 31
    • 46

    Mostly Sunny

    • 41
    • 58

    Mostly Cloudy

    • 53
    • 62

    Mostly Cloudy

    • 32
    • 64

    Mostly Sunny

    • 42
    • 57

    Partly Sunny

    • 48
    • 69

    Partly Sunny

Today 15 Dec Le Flore

Sunny and not as cool. Near steady temperature in the lower 40s. Southwest Winds around 5 Mph.

Tonight 15 Dec Le Flore

Mostly clear in the Evening, then becoming partly cloudy. Not as cold with Lows in the lower 30s. South Winds around 5 Mph.

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Rock Island Temperature Statistics

December Temperature

Fort Smith Regional Airport (11.8 miles)

  • Lowest 3 December, 2025

    30.9 °F

  • Average December

    42.2 °F

  • Highest 12 December, 2025

    69.1 °F

Climate (2020–Present)

Fort Smith Regional Airport (11.8 miles)

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  • Average Low 2020–2025

    53.8 °F

  • Average 2020–2025

    64.1 °F

  • Average High 2020–2025

    75.3 °F
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