Lake Dardanelle Weather Forecast

    • 79
    • 91

    Slight Chance Thunderstorms

    • 80
    • 97

    Slight Chance Thunderstorms

    • 80
    • 101

    Hot

    • 80
    • 102

    Hot

    • 81
    • 103

    Hot

    • 80
    • 101

    Slight Chance Thunderstorms

Today 24 Jul Southern Johnson County

Mostly cloudy this Morning, then becoming partly sunny. Highs in the lower 90s. Southeast Winds around 5 Mph. Heat index Values up to 105 this afternoon.

Tonight 24 Jul Southern Johnson County

Mostly cloudy. A slight chance of Showers and Thunderstorms after midnight. Lows in the mid 70s. South Winds around 5 Mph, becoming east around 5 Mph after midnight. Chance of rain 20 percent. Average rainfall less than 1/10 inch. Heat index Values up to 105 early in the evening.

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Lake Dardanelle Temperature Statistics

July Temperature

Russelville Municipal Airport (15.5 miles)

  • Lowest 7 July, 2026

    68.6 °F

  • Average July

    83.9 °F

  • Highest 21 July, 2026

    104.6 °F

Climate (2021–2026)

Russelville Municipal Airport (15.5 miles)

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  • Average Low 2021–2026

    52.5 °F

  • Average 2021–2026

    63.8 °F

  • Average High 2021–2026

    75.5 °F
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