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Sumac Lake, MI Weather Forecast
Sumac Lake, MI Weather Forecast Date: 117 AM EDT Thu Oct 01 2026
The area/counties/county of: Ontonagon, including the city of Ontonagon.or toggle through each period.
Rest of Tonight... Cloudy. Patchy fog. Lows in the mid 50s. Light southwest winds.
Thursday... Cooler. Mostly cloudy. Highs 62 to 67. Temperature falling into the upper 50s in the afternoon. Northwest winds 5 to 10 mph.
Thursday Night... Mostly clear. Areas of frost after midnight. Lows 34 to 39 inland to around 43 at The shore. Light northwest winds inland, except northwest 10 to 20 mph near the shore.
Friday... Patchy frost in the morning. Sunny. Highs around 58. Northwest winds 5 to 10 mph inland, except northwest 10 to 20 mph near the shore.
Friday Night... Mostly clear. Areas of frost after midnight. Lows 30 to 35 inland to around 40 at The shore. Light southwest winds.
Saturday... Mostly cloudy. Areas of frost in the morning. Highs around 62.
Saturday Night... A chance of rain showers in the evening. Mostly cloudy. Lows 41 to 46. Chance of rain 40%.
Sunday... Mostly sunny. Highs around 59.
Sunday Night... Areas of frost. Clear. Lows 29 to 34 inland to around 41 at The shore. Highs around 56.
Monday... Areas of frost. Clear. Lows 29 to 34 inland to around 41 at The shore. Highs around 56.
Monday Night... Mostly clear. Areas of frost after midnight. Lows around 32 inland to around 41 at The shore.
Tuesday... Warmer. Partly cloudy. Highs around 67. Lows around 47.
Tuesday Night... Warmer. Partly cloudy. Highs around 67. Lows around 47.
POP = Probability of Precipitation
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