Grafton Weather Forecast

    • 50
    • 72

    Increasing Clouds

    • 55
    • 74

    Slight Chance Thunderstorms

    • 52
    • 75

    Mostly Sunny

    • 51
    • 71

    Partly Sunny

    • 53
    • 70

    Mostly Cloudy

    • 54
    • 74

    Mostly Cloudy

Today 26 Aug Worth

Sunny. Highs in the lower 70s. West Winds around 5 Mph.

Tonight 26 Aug Worth

Mostly clear in the Evening, then becoming partly cloudy. Lows around 50. South Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Grafton Temperature Statistics

August Temperature

Mason City Municipal Airport (17.4 miles)

  • Lowest 24 August, 2025

    48.9 °F

  • Average August

    71 °F

  • Highest 16 August, 2025

    90.6 °F

Climate (2020–Present)

Mason City Municipal Airport (17.4 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