Sumner Weather Forecast

    • 56
    • 77

    Becoming Sunny

    • 65
    • 78

    Partly Sunny

    • 76
    • 87

    Partly Sunny

    • 76
    • 92

    Breezy

    • 74
    • 91

    Chance Thunderstorms

    • 74
    • 91

    Mostly Sunny

    • 72
    • 92

    Slight Chance Thunderstorms

Today 26 Jun Bremer

Mostly sunny. Highs in the upper 70s. Southeast Winds around 10 Mph.

Tonight 26 Jun Bremer

Mostly clear. Lows in the mid 50s. East Winds 5 to 10 Mph.

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  • Temperature Real-Time

Sumner Temperature Statistics

June Temperature

Oelwein Municipal Airport (12.4 miles)

  • Lowest 15 June, 2026

    48.2 °F

  • Average June

    67.7 °F

  • Highest 4 June, 2026

    86 °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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