Mason City Weather Forecast

    • 54
    • 70

    Decreasing Clouds

    • 60
    • 70

    Rain Showers

    • 57
    • 69

    Rain Showers

    • 46
    • 65

    Slight Chance Rain Showers

    • 44
    • 63

    Mostly Sunny

    • 47
    • 63

    Partly Sunny

Today 28 Sep Cerro Gordo

Mostly cloudy. A slight chance of very light drizzle in the morning. Patchy fog in the morning. Highs around 70. Southeast Winds around 5 Mph.

Tonight 28 Sep Cerro Gordo

Mostly cloudy. Lows in the mid 50s. South Winds 5 to 10 Mph.

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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

    66.7 °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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