Sumner Weather Forecast

    • 35
    • 65

    Mostly Sunny

    • 49
    • 65

    Chance Thunderstorms

    • 48
    • 78

    Breezy

    • 43
    • 68

    Mostly Sunny

    • 52
    • 72

    Chance Rain Showers

    • 56
    • 82

    Partly Sunny

Today 10 May Bremer

Sunny. Highs in the mid 60s. Northwest Winds 5 to 10 Mph, increasing to around 15 Mph with Gusts up to 25 Mph in the afternoon.

Tonight 10 May Bremer

Mostly clear. Lows in the upper 30s. Northwest Winds around 5 Mph.

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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

    50.5 °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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