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St. Clair Lake, MI Weather Forecast
St. Clair Lake, MI Weather Forecast Date: 526 PM EDT Fri Oct 23 2026
The area/counties/county of: Marquette, including the cities of: Gwinn and Marquette.or toggle through each period.
Tonight... Mostly cloudy. Patchy fog. Lows in the upper 40s. South winds 5 to 10 mph with gusts up to 25 mph.
Saturday... Patchy fog in the morning. Mostly cloudy. Highs around 67. South winds 10 to 20 mph with gusts up to 35 mph.
Saturday Night... A chance of showers after midnight. Mostly cloudy. Lows 46 to 51. South winds 10 to 15 mph with gusts up to 30 mph, becoming southwest 5 to 10 mph with gusts up to 20 mph after midnight. Chance of rain 40%.
Sunday... Cooler. A chance of showers in the morning. Mostly cloudy. Highs around 56. Northwest winds 5 to 10 mph. Chance of rain 50%.
Sunday Night... Mostly cloudy. Lows 34 to 39. Northwest winds 5 to 10 mph with gusts up to 20 mph.
Monday... Cooler. Mostly cloudy. Highs around 45. Lows around 29 inland to around 37 at The shore.
Monday Night... Cooler. Mostly cloudy. Highs around 45. Lows around 29 inland to around 37 at The shore.
Tuesday... Mostly cloudy with a 30% chance of rain showers. Highs around 46. Lows around 34 inland to around 41 at The shore.
Tuesday Night... Mostly cloudy with a 30% chance of rain showers. Highs around 46. Lows around 34 inland to around 41 at The shore.
Wednesday... Warmer. Mostly cloudy. Highs around 57.
Wednesday Night... A chance of rain showers in the evening. Mostly cloudy. Lows 39 to 44. Chance of rain 30%.
Thursday... Partly cloudy. Highs around 54. Lows around 32 inland to around 40 at The shore.
Thursday Night... Partly cloudy. Highs around 54. Lows around 32 inland to around 40 at The shore.
POP = Probability of Precipitation
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