Mason City Weather Forecast

    • 59
    • 73

    Rain Showers Likely

    • 46
    • 65

    Slight Chance Rain Showers

    • 43
    • 63

    Mostly Sunny

    • 46
    • 63

    Partly Sunny

    • 42
    • 63

    Mostly Sunny

    • 46
    • 61

    Partly Sunny

Today 30 Sep Cerro Gordo

Mostly cloudy. Patchy fog early this morning. A slight chance of Showers early. A slight chance of Showers this afternoon. Humid with Highs in the lower 70s. Southwest Winds around 5 Mph. Chance of rain 20 percent.

Tonight 30 Sep Cerro Gordo

Cloudy with a 50 percent chance of Showers. Lows in the upper 50s. Southwest Winds around 5 Mph, becoming north after midnight.

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Mason City Temperature Statistics

September Temperature

Mason City Municipal Airport (6.2 miles)

  • Lowest 23 September, 2026

    42.7 °F

  • Average September

    66.3 °F

  • Highest 4 September, 2026

    90.6 °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

    48 °F

  • Average High 2021–2026

    58.5 °F
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