Sumner Weather Forecast

    • 64
    • 78

    Rain Showers Likely

    • 67
    • 83

    Rain Showers Likely

    • 66
    • 82

    Rain Showers Likely

    • 63
    • 78

    Chance Thunderstorms

    • 60
    • 77

    Slight Chance Thunderstorms

    • 58
    • 73

    Partly Sunny

Today 8 Aug Bremer

Mostly sunny. Highs in the upper 70s. Northwest Winds around 5 Mph, becoming southwest in the afternoon.

Tonight 8 Aug Bremer

Mostly cloudy in the Evening, then partly cloudy with Showers likely with a chance of Thunderstorms after midnight. Humid with Lows in the mid 60s. South Winds 5 to 10 Mph. Chance of rain 60 percent.

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Sumner Temperature Statistics

August Temperature

Oelwein Municipal Airport (12.4 miles)

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  • Average August

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Climate (2021–2026)

Oelwein Municipal Airport (12.4 miles)

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  • Average Low 2021–2026

    38.5 °F

  • Average 2021–2026

    48.2 °F

  • Average High 2021–2026

    58 °F
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