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

43°F

6°C

Humidity 46%
Wind Speed S 7 mph
Barometer 30.31 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 24 Mar 6:35 pm EDT
Extended Forecast for

2 Miles S Fort Gratiot MI

  • Tonight

    Tonight: Mostly cloudy, with a low around 30. West southwest wind around 6 mph becoming calm in the evening.

    Low: 30 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 50. Light south wind increasing to 5 to 10 mph in the morning.

    High: 50 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 43. South wind around 7 mph.

    Low: 43 °F

    Mostly Cloudy

  • Thursday

    Thursday: Rain likely after 2pm. Mostly cloudy, with a high near 62. Southwest wind 7 to 10 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 62 °F

    Partly Sunny
    then Rain
    Likely

  • Thursday Night

    Thursday Night: Rain likely, mainly before 8pm. Mostly cloudy, with a low around 26. North wind 11 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 26 °F

    Rain Likely

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 32.

    High: 32 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 21.

    Low: 21 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 30. West southwest wind around 6 mph becoming calm in the evening.
Wednesday
Mostly cloudy, with a high near 50. Light south wind increasing to 5 to 10 mph in the morning.
Wednesday Night
Mostly cloudy, with a low around 43. South wind around 7 mph.
Thursday
Rain likely after 2pm. Mostly cloudy, with a high near 62. Southwest wind 7 to 10 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Rain likely, mainly before 8pm. Mostly cloudy, with a low around 26. North wind 11 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 32.
Friday Night
Mostly clear, with a low around 21.
Saturday
Mostly sunny, with a high near 43.
Saturday Night
Partly cloudy, with a low around 28.
Sunday
Partly sunny, with a high near 50.
Sunday Night
Mostly cloudy, with a low around 36.
Monday
Partly sunny, with a high near 55.
Monday Night
A chance of rain. Mostly cloudy, with a low around 39.
Tuesday
A chance of rain. Mostly cloudy, with a high near 54.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Fort Gratiot MI
 43.04°N 82.48°W (Elev. 620 ft)
Last Update:
4:24 pm EDT Mar 24, 2026
Forecast Valid:
6pm EDT Mar 24, 2026-6pm EDT Mar 31, 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