Sumner Weather Forecast

    • 72
    • 89

    Mostly Sunny

    • 64
    • 85

    Mostly Sunny

    • 70
    • 85

    Chance Thunderstorms

    • 69
    • 90

    Rain Showers Likely

    • 57
    • 80

    Mostly Sunny

    • 58
    • 76

    Mostly Sunny

    • 61
    • 79

    Slight Chance Thunderstorms

Today 17 Jul Bremer

Mostly sunny. Near steady temperature in the upper 80s. Southwest Winds around 10 Mph.

Tonight 17 Jul Bremer

Mostly clear. Lows in the lower 70s. Southwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sumner Temperature Statistics

July Temperature

Oelwein Municipal Airport (12.4 miles)

  • Lowest 6 July, 2026

    64.4 °F

  • Average July

    74.7 °F

  • Highest 1 July, 2026

    87.8 °F

Climate (2021–2026)

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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