Lake Dardanelle Weather Forecast

    • 75
    • 89

    Slight Chance Thunderstorms

    • 76
    • 93

    Mostly Sunny

    • 77
    • 95

    Mostly Sunny

    • 78
    • 96

    Slight Chance Thunderstorms

    • 78
    • 97

    Hot

    • 77
    • 95

    Chance Thunderstorms

Today 8 Aug Southern Johnson County

Mostly sunny. A slight chance of Showers and Thunderstorms in the morning. Highs in the mid 90s. South Winds around 5 Mph. Chance of rain 20 percent. Average rainfall less than 1/10 inch. Heat index Values up to 108 in the afternoon.

Tonight 8 Aug Southern Johnson County

Partly cloudy. Lows in the lower 70s. Southeast Winds around 5 Mph in the Evening, becoming light and variable. Heat index Values up to 106 early in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Dardanelle Temperature Statistics

August Temperature

Russelville Municipal Airport (15.5 miles)

  • Lowest 3 August, 2026

    66.7 °F

  • Average August

    82.2 °F

  • Highest 5 August, 2026

    100 °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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