Sumner Weather Forecast

    • 63
    • 82

    Chance Thunderstorms

    • 64
    • 84

    Slight Chance Thunderstorms

    • 66
    • 83

    Thunderstorms Likely

    • 66
    • 81

    Rain Showers Likely

    • 69
    • 88

    Slight Chance Thunderstorms

    • 73
    • 92

    Partly Sunny

Today 5 Jun Bremer

Mostly cloudy with a chance of Showers and Thunderstorms early this Morning, then mostly sunny this afternoon. Some Thunderstorms may produce heavy rainfall early this morning. Humid with Highs in the lower 80s. South Winds 5 to 10 Mph, becoming southwest this afternoon. Chance of rain 50 percent.

Tonight 5 Jun Bremer

Partly cloudy with a chance of Showers and Thunderstorms. Humid with Lows in the lower 60s. Southwest Winds 5 to 10 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sumner Temperature Statistics

June Temperature

Oelwein Municipal Airport (12.4 miles)

  • Lowest 2 June, 2026

    53.6 °F

  • Average June

    69 °F

  • Highest 3 June, 2026

    82.4 °F

Climate (2021–Present)

Oelwein Municipal Airport (12.4 miles)

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  • Average Low 2021–2026

    38.7 °F

  • Average 2021–2026

    48.5 °F

  • Average High 2021–2026

    58.3 °F
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