Sumner Weather Forecast

    • 57
    • 80

    Chance Rain Showers

    • 59
    • 78

    Chance Thunderstorms

    • 57
    • 81

    Chance Thunderstorms

    • 56
    • 81

    Mostly Sunny

    • 60
    • 81

    Chance Thunderstorms

    • 63
    • 82

    Chance Thunderstorms

Today 30 May Bremer

Mostly cloudy. Highs around 80. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 30 May Bremer

Mostly cloudy. A slight chance of Showers after midnight. Lows in the upper 50s. East Winds 15 to 20 Mph. Chance of rain 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Sumner Temperature Statistics

May Temperature

Oelwein Municipal Airport (12.4 miles)

  • Lowest 6 May, 2026

    30.2 °F

  • Average May

    59.8 °F

  • Highest 27 May, 2026

    87.8 °F

Climate (2021–Present)

Oelwein Municipal Airport (12.4 miles)

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

  • Average Low 2021–2026

    38.7 °F

  • Average 2021–2026

    48.5 °F

  • Average High 2021–2026

    58.3 °F
Get WillyWeather+ to remove ads