Lake Dardanelle Weather Forecast

    • 80
    • 98

    Hot

    • 78
    • 100

    Chance Thunderstorms

    • 79
    • 101

    Hot

    • 80
    • 102

    Hot

    • 76
    • 98

    Slight Chance Thunderstorms

    • 75
    • 96

    Mostly Sunny

Today 16 Aug Southern Johnson County

Sunny. Highs in the upper 90s. West Winds 5 to 10 Mph. Heat index Values up to 109.

Tonight 16 Aug Southern Johnson County

Mostly clear. A slight chance of Showers and Thunderstorms in the evening. Lows in the mid 70s. West Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 20 percent. Average rainfall less than 1/10 inch. 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

    84.6 °F

  • Highest 5 August, 2026

    101.6 °F

Climate (2021–2026)

Russelville Municipal Airport (15.5 miles)

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  • Average Low 2021–2026

    52.5 °F

  • Average 2021–2026

    63.9 °F

  • Average High 2021–2026

    75.6 °F
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