Sis Lake Weather Forecast
- 63
- 81
Chance Rain Showers
- 55
- 77
Chance Rain Showers
- 51
- 70
Chance Rain Showers
- 46
- 66
Chance Rain Showers
- 46
- 67
Mostly Sunny
- 53
- 73
Partly Sunny
- 53
- 73
Partly Sunny
Today 22 Aug Newaygo
Mostly sunny. Highs in the lower 80s. West Winds 5 to 10 Mph.
Tonight 22 Aug Newaygo
Partly cloudy. A chance of Showers and a slight chance of Thunderstorms overnight. Lows in the lower 60s. Light Winds. Chance of rain 40 percent.
Sis Lake Temperature Statistics
August Temperature
Big Rapids, Roben-Hood Airport (17.4 miles)
Lowest 2 August, 2025
47.7 °FAverage August
71.8 °FHighest 16 August, 2025
90.5 °F
Climate (2020–Present)
Big Rapids, Roben-Hood Airport (17.4 miles)
Average Low 2020–2025
38.5 °FAverage 2020–2025
47.9 °FAverage High 2020–2025
56.9 °F