Chapin Weather Forecast

    • 61
    • 78

    Rain Showers

    • 56
    • 74

    Chance Thunderstorms

    • 58
    • 74

    Chance Thunderstorms

    • 59
    • 78

    Chance Thunderstorms

    • 55
    • 78

    Chance Rain Showers

    • 53
    • 73

    Chance Rain Showers

Today 18 Sep Franklin

Mostly cloudy with a chance of Showers and Thunderstorms. Near steady temperature in the mid 70s. South Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 18 Sep Franklin

Mostly cloudy. Showers with a chance of Thunderstorms in the Evening, then a chance of Showers with a slight chance of Thunderstorms after midnight. Patchy fog after midnight. Lows in the lower 60s. Southeast Winds around 5 Mph. Chance of rain 80 percent.

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Chapin Temperature Statistics

September Temperature

Mason City Municipal Airport (22.4 miles)

  • Lowest 7 September, 2025

    39 °F

  • Average September

    63.7 °F

  • Highest 13 September, 2025

    91 °F

Climate (2020–Present)

Mason City Municipal Airport (22.4 miles)

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  • Average Low 2020–2025

    37 °F

  • Average 2020–2025

    47.6 °F

  • Average High 2020–2025

    58.2 °F
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