South Bay Weather Forecast

    • 62
    • 78

    Rain Showers Likely

    • 63
    • 79

    Chance Thunderstorms

    • 60
    • 74

    Chance Thunderstorms

    • 61
    • 77

    Chance Rain Showers

    • 61
    • 79

    Chance Rain Showers

    • 57
    • 80

    Slight Chance Thunderstorms

Today 17 Sep Cerro Gordo

Partly sunny. Showers likely with a slight chance of Thunderstorms late this Morning, then a chance of Showers and Thunderstorms this afternoon. Highs in the lower 80s. Southeast Winds around 5 Mph. Chance of rain 60 percent.

Tonight 17 Sep Cerro Gordo

Mostly cloudy with a chance of Showers. A chance of Thunderstorms, mainly in the evening. Lows in the lower 60s. Southeast Winds around 5 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Bay Temperature Statistics

September Temperature

Mason City Municipal Airport (4.3 miles)

  • Lowest 7 September, 2025

    39 °F

  • Average September

    63.3 °F

  • Highest 13 September, 2025

    91 °F

Climate (2020–Present)

Mason City Municipal Airport (4.3 miles)

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  • Average Low 2020–2025

    36.9 °F

  • Average 2020–2025

    47.6 °F

  • Average High 2020–2025

    58.2 °F
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