Sumner Weather Forecast

    • 57
    • 86

    Becoming Sunny

    • 69
    • 88

    Slight Chance Thunderstorms

    • 73
    • 92

    Mostly Sunny

    • 63
    • 87

    Chance Thunderstorms

    • 59
    • 82

    Partly Sunny

    • 61
    • 84

    Chance Rain Showers

Today 3 Jul Gratiot

Sunny. A 20 percent chance of Showers in the afternoon. Highs in the mid 80s. Northwest Winds around 5 Mph.

Tonight 3 Jul Gratiot

Mostly clear. Lows in the upper 50s. Light Winds.

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  • Temperature Real-Time

Sumner Temperature Statistics

July Temperature

Alma, Gratiot Community Airport (6.2 miles)

  • Lowest 1 July, 2025

    64.4 °F

  • Average July

    74.1 °F

  • Highest 1 July, 2025

    82.4 °F

Climate (2020–Present)

Alma, Gratiot Community Airport (6.2 miles)

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  • Average Low 2020–2025

    39.6 °F

  • Average 2020–2025

    49.3 °F

  • Average High 2020–2025

    58.7 °F
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