Chillicothe Weather Forecast

    • 73
    • 90

    Slight Chance Thunderstorms

    • 73
    • 92

    Slight Chance Thunderstorms

    • 68
    • 89

    Slight Chance Thunderstorms

    • 63
    • 81

    Partly Sunny

    • 62
    • 83

    Mostly Sunny

    • 65
    • 86

    Mostly Sunny

Today 17 Aug Peoria

Mostly sunny. A slight chance of Showers and Thunderstorms in the afternoon. Humid with Highs in the lower 90s. South Winds around 5 Mph, becoming east around 5 Mph in the afternoon. Chance of rain 20 percent. Heat index Values up to 106 in the afternoon.

Tonight 17 Aug Peoria

Partly cloudy with a chance of Showers and Thunderstorms. Lows in the lower 70s. Southwest Winds around 5 Mph. Chance of rain 30 percent.

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Chillicothe Temperature Statistics

August Temperature

Marshall County Airport (8.1 miles)

  • Lowest 2 August, 2025

    54 °F

  • Average August

    73.3 °F

  • Highest 9 August, 2025

    89.8 °F

Climate (2020–Present)

Marshall County Airport (8.1 miles)

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  • Average Low 2020–2025

    42.1 °F

  • Average 2020–2025

    52 °F

  • Average High 2020–2025

    61.7 °F
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