Lake Dardanelle Weather Forecast

    • 79
    • 104

    Slight Chance Thunderstorms

    • 76
    • 98

    Hot

    • 76
    • 97

    Hot

    • 78
    • 98

    Slight Chance Thunderstorms

    • 77
    • 98

    Slight Chance Thunderstorms

    • 78
    • 97

    Hot

Today 19 Aug Southern Johnson County

Sunny. A slight chance of Showers and Thunderstorms this afternoon. Hot with Highs around 106. West Winds 5 to 10 Mph. Chance of rain 20 percent. Average rainfall less than 1/10 inch. Heat index Values up to 114 this afternoon.

Tonight 19 Aug Southern Johnson County

Mostly clear with a slight chance of Showers and Thunderstorms in the Evening, then partly cloudy after midnight. Lows in the mid 70s. Southwest Winds around 5 Mph, becoming northeast around 5 Mph after midnight. Chance of rain 20 percent. Average rainfall less than 1/10 inch. Heat index Values up to 111 early in the evening.

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Lake Dardanelle Temperature Statistics

August Temperature

Russelville Municipal Airport (15.5 miles)

  • Lowest 3 August, 2026

    66.7 °F

  • Average August

    85 °F

  • Highest 14 August, 2026

    102.7 °F

Climate (2021–2026)

Russelville Municipal Airport (15.5 miles)

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  • Average Low 2021–2026

    52.5 °F

  • Average 2021–2026

    63.9 °F

  • Average High 2021–2026

    75.6 °F
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