Lost Valley State Park Weather Forecast

    • 63
    • 87

    Chance Thunderstorms

    • 61
    • 81

    Rain Showers Likely

    • 64
    • 84

    Chance Rain Showers

    • 64
    • 80

    Chance Thunderstorms

    • 63
    • 79

    Chance Thunderstorms

    • 62
    • 82

    Chance Rain Showers

Today 18 Sep Newton County Higher Elevations

Mostly sunny. A chance of Showers and Thunderstorms in the afternoon. Highs in the upper 80s. Southwest Winds around 5 Mph. Chance of rain 30 percent. Average rainfall less than 1/10 inch.

Tonight 18 Sep Newton County Higher Elevations

Partly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then mostly cloudy with a chance of Showers and Thunderstorms after midnight. Lows in the mid 60s. Northwest Winds around 5 Mph, becoming southwest after midnight. Chance of rain 50 percent. Average rainfall less than 1/10 inch.

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Lost Valley State Park Temperature Statistics

September Temperature

Harrison, Boone County Airport (21.1 miles)

  • Lowest 7 September, 2025

    51.1 °F

  • Average September

    71.7 °F

  • Highest 12 September, 2025

    93 °F

Climate (2020–Present)

Harrison, Boone County Airport (21.1 miles)

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  • Average Low 2020–2025

    49.3 °F

  • Average 2020–2025

    59.5 °F

  • Average High 2020–2025

    70.3 °F
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