Sumner Weather Forecast

    • 28
    • 48

    Becoming Sunny

    • 46
    • 56

    Partly Sunny

    • 46
    • 75

    Mostly Sunny

    • 59
    • 78

    Partly Sunny

    • 47
    • 73

    Rain Showers

    • 40
    • 61

    Chance Rain Showers

    • 37
    • 59

    Partly Sunny

Today 19 Apr Bremer

Mostly sunny. Near steady temperature in the upper 40s. Northwest Winds 10 to 15 Mph.

Tonight 19 Apr Bremer

Mostly clear. Lows in the upper 20s. North Winds 10 to 15 Mph, becoming northeast around 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sumner Temperature Statistics

April Temperature

Oelwein Municipal Airport (12.4 miles)

  • Lowest 7 April, 2026

    23 °F

  • Average April

    48.1 °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

    38.6 °F

  • Average 2021–2026

    48.4 °F

  • Average High 2021–2026

    58.2 °F
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