Sis Lake Weather Forecast

    • 43
    • 68

    Increasing Clouds

    • 48
    • 67

    Mostly Cloudy

    • 46
    • 68

    Mostly Cloudy

    • 38
    • 60

    Mostly Cloudy

    • 39
    • 56

    Mostly Cloudy

    • 44
    • 63

    Mostly Cloudy

Today 23 Oct Newaygo

Mostly sunny. Highs in the upper 60s. Light Winds.

Tonight 23 Oct Newaygo

Partly cloudy. Lows in the lower 40s. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sis Lake Temperature Statistics

October Temperature

Big Rapids, Roben-Hood Airport (17.4 miles)

  • Lowest 17 October, 2026

    30.2 °F
  • Average October

    54.1 °F
  • Highest 12 October, 2026

    82.4 °F

Climate (2021–2026)

Big Rapids, Roben-Hood Airport (17.4 miles)

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  • Average Low 2021–2026

    38.3 °F
  • Average 2021–2026

    47.9 °F
  • Average High 2021–2026

    57.2 °F
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