Sumner Weather Forecast

    • 56
    • 76

    Becoming Sunny

    • 62
    • 76

    Partly Sunny

    • 54
    • 75

    Chance Rain Showers

    • 60
    • 71

    Rain Showers

    • 56
    • 79

    Rain Showers Likely

    • 53
    • 69

    Chance Rain Showers

Today 10 Sep Bremer

Sunny. Highs in the upper 70s. Northwest Winds around 5 Mph.

Tonight 10 Sep Bremer

Mostly clear. Lows in the upper 50s. Southeast Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Sumner Temperature Statistics

September Temperature

Oelwein Municipal Airport (12.4 miles)

  • Lowest 7 September, 2026

    62.6 °F

  • Average September

    74.9 °F

  • Highest 4 September, 2026

    89.6 °F

Climate (2021–2026)

Oelwein Municipal Airport (12.4 miles)

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

  • Average Low 2021–2026

    38.4 °F

  • Average 2021–2026

    48.2 °F

  • Average High 2021–2026

    57.9 °F
Get WillyWeather+ to remove ads