Sumner Weather Forecast

    • 63
    • 81

    Rain Showers Likely

    • 54
    • 80

    Rain Showers

    • 43
    • 64

    Mostly Cloudy

    • 41
    • 61

    Partly Sunny

    • 44
    • 64

    Partly Sunny

    • 48
    • 69

    Partly Sunny

Today 17 May Bremer

Mostly cloudy. A chance of Showers and Thunderstorms after Midnight, then Showers likely with a chance of Thunderstorms this morning. Breezy with Highs in the lower 80s. Southeast Winds around 10 Mph, increasing to 15 to 25 Mph with Gusts up to 35 Mph. Chance of rain 70 percent.

Tonight 17 May Bremer

Mostly cloudy with a chance of Thunderstorms. A chance of Showers in the Evening, then Showers likely after midnight. Breezy with Lows in the lower 60s. South Winds 15 to 25 Mph with Gusts up to 35 Mph. Chance of rain 70 percent.

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  • 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

    54.1 °F

  • Highest 4 May, 2026

    78.8 °F

Climate (2021–Present)

Oelwein Municipal Airport (12.4 miles)

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  • Average Low 2021–2026

    38.7 °F

  • Average 2021–2026

    48.4 °F

  • Average High 2021–2026

    58.2 °F
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