Mason City Weather Forecast

    • 62
    • 77

    Mostly Cloudy

    • 63
    • 79

    Chance Thunderstorms

    • 63
    • 84

    Rain Showers

    • 53
    • 78

    Mostly Sunny

    • 56
    • 77

    Mostly Sunny

    • 59
    • 81

    Chance Rain Showers

    • 56
    • 79

    Chance Rain Showers

Today 6 Sep Cerro Gordo

Mostly cloudy with a 20 percent chance of Showers. Highs in the upper 70s. Southeast Winds 5 to 10 Mph.

Tonight 6 Sep Cerro Gordo

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms Early, then a slight chance of Showers. Humid with Lows in the lower 60s. Southeast Winds 5 to 10 Mph. Chance of rain 30 percent.

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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

    78 °F

  • Highest 4 September, 2026

    90 °F

Climate (2021–2026)

Mason City Municipal Airport (6.2 miles)

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  • Average Low 2021–2026

    37.3 °F

  • Average 2021–2026

    47.9 °F

  • Average High 2021–2026

    58.6 °F
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