Lake Dardanelle Weather Forecast

    • 77
    • 96

    Slight Chance Thunderstorms

    • 76
    • 96

    Mostly Sunny

    • 75
    • 98

    Chance Thunderstorms

    • 75
    • 93

    Partly Sunny

    • 75
    • 93

    Mostly Sunny

    • 76
    • 96

    Mostly Sunny

Today 20 Aug Southern Johnson County

Sunny. Highs in the upper 90s. West Winds around 5 Mph, becoming northeast around 5 Mph. Heat index Values up to 109.

Tonight 20 Aug Southern Johnson County

Mostly clear. Lows in the lower 70s. Northeast Winds around 5 Mph. Heat index Values up to 108 early in the evening.

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  • Temperature Real-Time

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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