Mason City Weather Forecast

    • 61
    • 78

    Chance Thunderstorms

    • 60
    • 81

    Rain Showers Likely

    • 58
    • 76

    Rain Showers Likely

    • 59
    • 78

    Chance Thunderstorms

    • 59
    • 80

    Chance Thunderstorms

    • 55
    • 79

    Slight Chance Thunderstorms

    • 52
    • 75

    Mostly Sunny

Today 17 Sep Cerro Gordo

Showers likely with a chance of Thunderstorms. Highs in the upper 70s. Southeast Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 17 Sep Cerro Gordo

Mostly cloudy with a chance of Showers and Thunderstorms. Near steady temperature in the mid 60s. Southeast Winds around 5 Mph. Chance of rain 40 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Mason City Temperature Statistics

September Temperature

Mason City Municipal Airport (6.2 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 (6.2 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    36.9 °F

  • Average 2020–2025

    47.6 °F

  • Average High 2020–2025

    58.2 °F
Get WillyWeather+ to remove ads