Lake Dardanelle Weather Forecast

    • 77
    • 98

    Slight Chance Thunderstorms

    • 79
    • 99

    Hot

    • 79
    • 101

    Hot

    • 76
    • 97

    Slight Chance Thunderstorms

    • 75
    • 96

    Mostly Sunny

    • 75
    • 96

    Mostly Sunny

Today 17 Aug Southern Johnson County

Sunny. A slight chance of Showers and Thunderstorms this morning. Hot with Highs around 101. Northwest Winds around 5 Mph. Chance of rain 20 percent. Heat index Values up to 112.

Tonight 17 Aug Southern Johnson County

Mostly clear in the Evening, then becoming partly cloudy. Lows in the lower 70s. Northeast Winds around 5 Mph. Heat index Values up to 107 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

    84.8 °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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