Grass Lake Weather Forecast

    • 59
    • 81

    Partly Sunny

    • 59
    • 81

    Sunny

    • 62
    • 84

    Mostly Sunny

    • 65
    • 84

    Chance Rain

    • 63
    • 80

    Chance Rain

    • 61
    • 81

    Slight Chance Thunderstorms

    • 63
    • 83

    Mostly Sunny

Today 28 Jul St. Joseph

Mostly sunny. Near steady temperature around 80. North Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 28 Jul St. Joseph

Mostly clear. Lows in the upper 50s. Northwest Winds 10 to 15 Mph with Gusts up to 30 Mph, becoming north around 5 Mph after midnight.

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Grass Lake Temperature Statistics

July Temperature

Sturgis, Kirsch Municipal Airport (6.2 miles)

  • Lowest 23 July, 2026

    50 °F

  • Average July

    73.8 °F

  • Highest 1 July, 2026

    91.4 °F

Climate (2021–2026)

Sturgis, Kirsch Municipal Airport (6.2 miles)

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  • Average Low 2021–2026

    42.2 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.7 °F
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