Lost Valley State Park Weather Forecast

    • 71
    • 91

    Chance Rain Showers

    • 71
    • 92

    Slight Chance Rain Showers

    • 72
    • 92

    Mostly Sunny

    • 72
    • 93

    Mostly Sunny

    • 73
    • 93

    Slight Chance Thunderstorms

    • 71
    • 90

    Chance Rain Showers

Today 12 Sep Newton County Higher Elevations

Partly Cloudy, then becoming sunny this Morning, then becoming mostly sunny. A slight chance of Showers with isolated Thunderstorms this morning. A chance of Showers with isolated Thunderstorms this afternoon. Highs in the upper 80s. Southwest Winds around 5 Mph. Chance of rain 40 percent. Average rainfall less than 1/10 inch.

Tonight 12 Sep Newton County Higher Elevations

Partly cloudy with isolated Thunderstorms. A slight chance of Showers in the Evening, then a chance of Showers after midnight. Lows around 70. Light and variable Winds, becoming south around 5 Mph after midnight. Chance of rain 40 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 3 September, 2026

    71.7 °F

  • Average September

    87 °F

  • Highest 6 September, 2026

    103.6 °F

Climate (2021–2026)

Harrison, Boone County Airport (21.1 miles)

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  • Average Low 2021–2026

    50.3 °F

  • Average 2021–2026

    60.8 °F

  • Average High 2021–2026

    71.7 °F
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