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.

Overcast

55°F

13°C

Humidity 82%
Wind Speed N 5 mph
Barometer 30.15 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Wind Chill54°F (12°C)
Last update 14 Oct 7:35 pm EDT
Extended Forecast for

Fort Gratiot MI

  • Tonight

    Tonight: Mostly cloudy, with a low around 47. North wind 8 to 10 mph.

    Low: 47 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of rain after 4pm. Mostly cloudy, with a high near 60. East southeast wind around 9 mph. Chance of precipitation is 30%.

    High: 60 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday Night

    Thursday Night: Rain. Low around 49. East southeast wind 6 to 9 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 49 °F

    Rain

  • Friday

    Friday: Rain. High near 58. West wind 11 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 58 °F

    Rain

  • Friday Night

    Friday Night: Rain, mainly before 8pm. Low around 38. Breezy, with a north wind 18 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Breezy. Rain
    then Chance
    Rain

  • Saturday

    Saturday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 37.

    Low: 37 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 47. North wind 8 to 10 mph.
Thursday
A chance of rain after 4pm. Mostly cloudy, with a high near 60. East southeast wind around 9 mph. Chance of precipitation is 30%.
Thursday Night
Rain. Low around 49. East southeast wind 6 to 9 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Rain. High near 58. West wind 11 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Rain, mainly before 8pm. Low around 38. Breezy, with a north wind 18 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Sunny, with a high near 52.
Saturday Night
Clear, with a low around 37.
Sunday
Sunny, with a high near 61.
Sunday Night
Mostly clear, with a low around 42.
Monday
Mostly sunny, with a high near 64.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 65.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fort Gratiot MI
 43.08°N 82.5°W (Elev. 623 ft)
Last Update:
4:24 pm EDT Oct 14, 2026
Forecast Valid:
7pm EDT Oct 14, 2026-6pm EDT Oct 21, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation