Clear Lake Weather Forecast

    • 62
    • 86

    Slight Chance Thunderstorms

    • 60
    • 83

    Chance Thunderstorms

    • 60
    • 80

    Rain Showers Likely

    • 57
    • 75

    Rain Showers Likely

    • 58
    • 75

    Chance Rain Showers

    • 59
    • 78

    Chance Rain Showers

Today 16 Sep Cerro Gordo

Mostly sunny. A slight chance of Showers and Thunderstorms this afternoon. Highs in the mid 80s. South Winds around 5 Mph. Chance of rain 20 percent.

Tonight 16 Sep Cerro Gordo

Partly cloudy with a slight chance of Showers and Thunderstorms. Humid with Lows in the lower 60s. South Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Clear Lake Temperature Statistics

September Temperature

Mason City Municipal Airport (2.5 miles)

  • Lowest 7 September, 2025

    39 °F

  • Average September

    62.4 °F

  • Highest 13 September, 2025

    91 °F

Climate (2020–Present)

Mason City Municipal Airport (2.5 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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