Sumner Weather Forecast

    • 47
    • 77

    Rain Showers

    • 41
    • 63

    Becoming Sunny

    • 47
    • 66

    Partly Sunny

    • 52
    • 69

    Rain Showers

    • 44
    • 66

    Rain Showers

    • 40
    • 57

    Partly Sunny

    • 38
    • 57

    Partly Sunny

Today 23 Apr Bremer

Mostly cloudy with a chance of Showers and Thunderstorms. Breezy with Highs in the lower 70s. South Winds 20 to 25 Mph with Gusts up to 35 Mph. Chance of rain 50 percent.

Tonight 23 Apr Bremer

Showers with Thunderstorms likely late this Evening, then Showers likely with a chance of Thunderstorms. Locally heavy rainfall possible late this evening. Lows in the upper 40s. South Winds 15 to 20 Mph, becoming west 10 to 15 Mph. Chance of rain near 100 percent.

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Sumner Temperature Statistics

April Temperature

Oelwein Municipal Airport (12.4 miles)

  • Lowest 7 April, 2026

    23 °F

  • Average April

    47.1 °F

  • Highest 17 April, 2026

    80.6 °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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