Grass Lake Weather Forecast

    • 39
    • 69

    Becoming Sunny

    • 49
    • 70

    Mostly Sunny

    • 56
    • 68

    Mostly Cloudy

    • 45
    • 70

    Chance Rain Showers

    • 35
    • 56

    Mostly Cloudy

    • 30
    • 52

    Partly Sunny

Today 21 Oct Washburn

Mostly sunny. Highs around 70. Southwest Winds around 5 Mph.

Tonight 21 Oct Washburn

Mostly clear. Patchy fog after midnight. Lows in the upper 30s. Light and variable Winds.

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  • Temperature Real-Time

Grass Lake Temperature Statistics

October Temperature

Siren, Burnett County Airport (19.3 miles)

  • Lowest 17 October, 2026

    27 °F

  • Average October

    53.6 °F

  • Highest 10 October, 2026

    88.5 °F

Climate (2021–2026)

Siren, Burnett County Airport (19.3 miles)

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  • Average Low 2021–2026

    33 °F

  • Average 2021–2026

    44 °F

  • Average High 2021–2026

    53.9 °F
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