Sumner Weather Forecast

    • 51
    • 67

    Severe Tstms

    • 54
    • 73

    Mostly Sunny

    • 35
    • 75

    Rain Showers

    • 29
    • 45

    Slight Chance Rain Showers

    • 32
    • 52

    Mostly Sunny

    • 48
    • 63

    Mostly Sunny

    • 46
    • 69

    Mostly Sunny

Today 15 Apr Bremer

Showers and Thunderstorms likely. Some Thunderstorms may be severe with damaging Winds and large hail. Near steady temperature in the mid 60s. Southwest Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 15 Apr Bremer

Showers with a chance of Thunderstorms this Evening, then a chance of Showers and Thunderstorms after midnight. Patchy fog after midnight. Some Thunderstorms may be severe with damaging Winds and large hail this evening. Lows in the lower 50s. South Winds 5 to 10 Mph, becoming northeast this Evening, then becoming north after midnight. Chance of rain 90 percent.

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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

    45.4 °F

  • Highest 13 April, 2026

    75.2 °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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