Mason City Weather Forecast

    • 47
    • 56

    Rain Showers Likely

    • 43
    • 60

    Decreasing Clouds

    • 47
    • 64

    Partly Sunny

    • 50
    • 63

    Chance Rain Showers

    • 51
    • 65

    Rain Showers Likely

    • 54
    • 63

    Chance Rain Showers

    • 54
    • 67

    Mostly Cloudy

Today 21 Sep Cerro Gordo

Partly sunny with a 20 percent chance of Showers. Highs in the lower 70s.

Tonight 21 Sep Cerro Gordo

Showers likely early. Patchy fog early. Lows in the upper 40s. East Winds 5 to 10 Mph. Chance of rain 70 percent.

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Mason City Temperature Statistics

September Temperature

Mason City Municipal Airport (6.2 miles)

  • Lowest 16 September, 2026

    46.7 °F

  • Average September

    69 °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

    58.6 °F
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