Sumner Weather Forecast

    • 48
    • 70

    Decreasing Clouds

    • 28
    • 62

    Chance Rain Showers

    • 25
    • 44

    Mostly Sunny

    • 36
    • 53

    Partly Sunny

    • 46
    • 64

    Partly Sunny

    • 52
    • 75

    Chance Rain

Today 25 Mar Bremer

Partly sunny. Not as cool with Highs in the lower 70s. South Winds 10 to 15 Mph, becoming southwest this afternoon.

Tonight 25 Mar Bremer

Partly cloudy in the Evening, then clearing. Lows in the upper 40s. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sumner Temperature Statistics

March Temperature

Oelwein Municipal Airport (12.4 miles)

  • Lowest 16 March, 2026

    8.6 °F

  • Average March

    39.7 °F

  • Highest 21 March, 2026

    84.2 °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

    58.1 °F
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