Sumner Weather Forecast

    • 66
    • 92

    Increasing Clouds

    • 65
    • 86

    Slight Chance Thunderstorms

    • 65
    • 83

    Chance Rain Showers

    • 63
    • 86

    Chance Rain Showers

    • 61
    • 82

    Chance Thunderstorms

    • 58
    • 77

    Chance Rain Showers

    • 53
    • 74

    Chance Rain Showers

Today 13 Sep Bremer

Mostly sunny. Near steady temperature in the upper 80s. Southwest Winds 5 to 10 Mph.

Tonight 13 Sep Bremer

Partly cloudy this Evening, then becoming mostly cloudy. Lows in the mid 60s. Southeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sumner Temperature Statistics

September Temperature

Oelwein Municipal Airport (12.4 miles)

  • Lowest 4 September, 2025

    41 °F

  • Average September

    59.9 °F

  • Highest 11 September, 2025

    78.8 °F

Climate (2020–Present)

Oelwein Municipal Airport (12.4 miles)

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  • Average Low 2020–2025

    38.3 °F

  • Average 2020–2025

    48.1 °F

  • Average High 2020–2025

    57.8 °F
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