Sumner Weather Forecast

    • 50
    • 69

    Rain Showers Likely

    • 49
    • 73

    Rain Showers

    • 33
    • 60

    Rain Showers Likely

    • 25
    • 43

    Mostly Sunny

    • 37
    • 50

    Partly Sunny

    • 42
    • 65

    Partly Sunny

    • 42
    • 64

    Partly Sunny

Today 16 Apr Gratiot

Showers likely and a chance of Thunderstorms. Some Thunderstorms may produce heavy rainfall. Highs around 70. West Winds 5 to 10 Mph with Gusts to around 20 Mph. Chance of rain 70 percent.

Tonight 16 Apr Gratiot

Partly cloudy. A 50 percent chance of Showers and Thunderstorms in the evening. Widespread fog after midnight. Some Thunderstorms may produce heavy rainfall in the evening. Lows around 50. Northwest Winds around 10 Mph in the evening becoming light.

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Sumner Temperature Statistics

April Temperature

Alma, Gratiot Community Airport (6.2 miles)

  • Lowest 7 April, 2026

    23 °F

  • Average April

    44.3 °F

  • Highest 12 April, 2026

    77 °F

Climate (2021–Present)

Alma, Gratiot Community Airport (6.2 miles)

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  • Average Low 2021–2026

    39.2 °F

  • Average 2021–2026

    49 °F

  • Average High 2021–2026

    58.5 °F
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