Sumner Weather Forecast

    • 50
    • 68

    Sunny

    • 52
    • 74

    Mostly Sunny

    • 48
    • 71

    Partly Sunny

    • 48
    • 67

    Partly Sunny

    • 51
    • 67

    Mostly Sunny

    • 58
    • 72

    Mostly Sunny

Today 5 Oct Bremer

Sunny. Highs in the upper 60s. Northwest Winds around 5 Mph, becoming northeast this Morning, then becoming south this afternoon.

Tonight 5 Oct Bremer

Mostly clear. Lows in the lower 50s. South Winds 5 to 10 Mph.

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Sumner Temperature Statistics

October Temperature

Oelwein Municipal Airport (12.4 miles)

  • Lowest 2 October, 2026

    42.8 °F

  • Average October

    57.3 °F

  • Highest 1 October, 2026

    68 °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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