Sumner Weather Forecast

    • 67
    • 84

    Thunderstorms Likely

    • 64
    • 80

    Chance Rain Showers

    • 63
    • 81

    Slight Chance Thunderstorms

    • 64
    • 82

    Mostly Sunny

    • 65
    • 84

    Mostly Sunny

    • 67
    • 85

    Mostly Sunny

    • 68
    • 87

    Mostly Sunny

Today 8 Jul Bremer

Mostly sunny. Near steady temperature in the mid 80s. Southwest Winds 10 to 15 Mph.

Tonight 8 Jul Bremer

Thunderstorms likely. Showers likely. Some Thunderstorms may produce heavy rainfall. Lows in the upper 60s. South Winds 5 to 10 Mph. Chance of rain 70 percent.

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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

    74.6 °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

    38.8 °F

  • Average 2021–2026

    48.6 °F

  • Average High 2021–2026

    58.3 °F
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