Plymouth Weather Forecast

    • 61
    • 81

    Chance Thunderstorms

    • 58
    • 80

    Chance Rain Showers

    • 61
    • 80

    Chance Thunderstorms

    • 61
    • 81

    Chance Thunderstorms

    • 59
    • 83

    Chance Thunderstorms

    • 55
    • 81

    Slight Chance Rain Showers

Today 18 Sep Carroll

Mostly cloudy with a slight chance of Showers and Thunderstorms after Midnight, then partly sunny with a chance of Showers and Thunderstorms. Highs in the lower 80s. Northeast Winds around 5 Mph, becoming west this Morning, then becoming south around 5 Mph this afternoon. Chance of rain 50 percent.

Tonight 18 Sep Carroll

Mostly cloudy with a chance of Showers. A chance of Thunderstorms, mainly in the evening. Lows in the lower 60s. South Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 50 percent.

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Plymouth Temperature Statistics

September Temperature

Chillicothe, Chillicothe Agri-Science Center (16.2 miles)

  • Lowest 7 September, 2025

    42.1 °F

  • Average September

    68.3 °F

  • Highest 13 September, 2025

    96.1 °F

Climate (2020–Present)

Chillicothe, Chillicothe Agri-Science Center (16.2 miles)

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  • Average Low 2020–2025

    45.2 °F

  • Average 2020–2025

    55.8 °F

  • Average High 2020–2025

    66.4 °F
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