Sumner Weather Forecast

    • 46
    • 68

    Sunny

    • 48
    • 72

    Mostly Sunny

    • 50
    • 73

    Mostly Sunny

    • 54
    • 69

    Mostly Cloudy

    • 52
    • 70

    Mostly Cloudy

    • 47
    • 67

    Partly Sunny

Today 20 Oct Bremer

Sunny. Highs in the upper 60s. Southeast Winds 5 to 10 Mph.

Tonight 20 Oct Bremer

Clear. Lows in the mid 40s. Southeast Winds 5 to 10 Mph.

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Sumner Temperature Statistics

October Temperature

Oelwein Municipal Airport (12.4 miles)

  • Lowest 17 October, 2026

    30.2 °F

  • Average October

    58.5 °F

  • Highest 12 October, 2026

    87.8 °F

Climate (2021–2026)

Oelwein Municipal Airport (12.4 miles)

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  • Average Low 2021–2026

    38.5 °F

  • Average 2021–2026

    48.1 °F

  • Average High 2021–2026

    57.8 °F
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