Mason City Weather Forecast

    • 64
    • 80

    Mostly Cloudy

    • 61
    • 79

    Chance Rain Showers

    • 65
    • 80

    Partly Sunny

    • 63
    • 87

    Rain Showers Likely

    • 56
    • 80

    Partly Sunny

    • 56
    • 78

    Partly Sunny

    • 58
    • 80

    Slight Chance Thunderstorms

Today 5 Sep Cerro Gordo

Mostly cloudy. Highs in the lower 80s. East Winds 5 to 10 Mph.

Tonight 5 Sep Cerro Gordo

Mostly cloudy. Humid with Lows in the mid 60s. East Winds 5 to 10 Mph.

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Mason City Temperature Statistics

September Temperature

Mason City Municipal Airport (6.2 miles)

  • Lowest 1 September, 2026

    62.7 °F

  • Average September

    75.9 °F

  • Highest 1 September, 2026

    87.7 °F

Climate (2021–2026)

Mason City Municipal Airport (6.2 miles)

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  • Average Low 2021–2026

    37.2 °F

  • Average 2021–2026

    47.9 °F

  • Average High 2021–2026

    58.6 °F
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