Summit Lake State Park Weather Forecast

    • 47
    • 69

    Becoming Sunny

    • 52
    • 72

    Partly Sunny

    • 52
    • 73

    Slight Chance Thunderstorms

    • 48
    • 69

    Mostly Sunny

    • 50
    • 71

    Partly Sunny

    • 53
    • 75

    Partly Sunny

Today 26 Aug Henry

Partly cloudy. Highs around 70. Northwest Winds 5 to 10 Mph.

Tonight 26 Aug Henry

Mostly clear. Lows in the upper 40s. Northwest Winds around 5 Mph through Midnight, becoming light and variable.

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Summit Lake State Park Temperature Statistics

August Temperature

Muncie, Delaware County-Johnson Field (14.9 miles)

  • Lowest 3 August, 2025

    49.6 °F

  • Average August

    74.3 °F

  • Highest 9 August, 2025

    90.6 °F

Climate (2020–Present)

Muncie, Delaware County-Johnson Field (14.9 miles)

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  • Average Low 2020–2025

    46.1 °F

  • Average 2020–2025

    55.4 °F

  • Average High 2020–2025

    64.8 °F
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