National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St Clair County International Airport (KPHN)

Lat: 42.91°NLon: 82.53°WElev: 636ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Fort Gratiot MI

  • This Afternoon

    This Afternoon: Sunny, with a high near 58. South southwest wind around 16 mph, with gusts as high as 24 mph.

    High: 58 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 45. South southwest wind 8 to 11 mph, with gusts as high as 20 mph.

    Low: 45 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 63. Southwest wind around 6 mph.

    High: 63 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 48. Light and variable wind.

    Low: 48 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 60. Northeast wind around 6 mph.

    High: 60 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 58. South southwest wind around 16 mph, with gusts as high as 24 mph.
Tonight
Clear, with a low around 45. South southwest wind 8 to 11 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 63. Southwest wind around 6 mph.
Monday Night
Increasing clouds, with a low around 48. Light and variable wind.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 60. Northeast wind around 6 mph.
Tuesday Night
Mostly clear, with a low around 46.
Wednesday
Sunny, with a high near 61.
Wednesday Night
Mostly clear, with a low around 45.
Thursday
Sunny, with a high near 63.
Thursday Night
Mostly clear, with a low around 47.
Friday
Sunny, with a high near 58.
Friday Night
Mostly clear, with a low around 44.
Saturday
Sunny, with a high near 61.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fort Gratiot MI
 43.08°N 82.47°W (Elev. 600 ft)
Last Update:
4:24 pm EDT Oct 18, 2026
Forecast Valid:
4pm EDT Oct 18, 2026-6pm EDT Oct 24, 2026
 
Forecast Discussion
 
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Additional Resources

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