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Sister Lake, MI Weather Forecast
Sister Lake, MI Weather Forecast Date: 117 AM EDT Thu Oct 01 2026
The area/counties/county of: Alger, including the cities of: Grand Marais and Munising.or toggle through each period.
Rest of Tonight... Cloudy. Patchy fog. Near steady temperature around 60. Southwest winds 5 to 10 mph.
Thursday... Cloudy. Highs around 67. Temperature falling to around 60 in the afternoon. Inland, northwest winds 5 to 10 mph, becoming north in the afternoon. Near the shore, northwest winds 10 to 20 mph.
Thursday Night... Areas of frost after midnight. Mostly cloudy in the evening, then clearing. Lows around 38 inland to around 46 at The shore. Northwest winds 5 to 10 mph inland, except northwest 10 to 20 mph near the shore.
Friday... Partly cloudy. Highs around 59. Northwest winds 5 to 15 mph inland, except northwest 15 to 25 mph near the shore.
Friday Night... Mostly clear. Areas of frost in the evening. Widespread frost after midnight. Lows around 29 inland to around 40 at The shore. Light northwest winds inland, except northwest 5 to 15 mph near the shore.
Saturday... Partly cloudy. Widespread frost in the morning. Highs around 62.
Saturday Night... Rain showers likely in the evening, then a chance of rain showers after midnight. Cloudy. Lows around 41 inland to around 47 at The shore. Chance of rain 70%.
Sunday... Partly cloudy. Highs around 61.
Sunday Night... Mostly clear. Widespread frost after midnight. Lows around 30 inland to around 39 at The shore.
Monday... Areas of frost in the morning. Mostly sunny. Highs around 55.
Monday Night... Mostly clear. Areas of frost in the evening. Widespread frost after midnight. Lows around 29 inland to around 38 at The shore.
Tuesday... Areas of frost in the morning. Mostly sunny. Highs around 63.
Tuesday Night... Partly cloudy. Lows around 40 inland to around 46 at The shore.
POP = Probability of Precipitation
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