Sumner Weather Forecast

    • 50
    • 81

    Sunny

    • 59
    • 79

    Mostly Sunny

    • 54
    • 75

    Rain Showers

    • 43
    • 66

    Chance Rain Showers

    • 45
    • 64

    Mostly Cloudy

    • 49
    • 65

    Chance Rain Showers

    • 43
    • 61

    Chance Rain Showers

Today 21 Apr Bremer

Sunny. Not as cool with Highs in the upper 70s. West Winds 5 to 10 Mph.

Tonight 21 Apr Bremer

Mostly clear. Lows around 50. West Winds around 5 Mph, becoming east after midnight.

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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

    38.6 °F
  • Average 2021–2026

    48.4 °F
  • Average High 2021–2026

    58.2 °F
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