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

32°F

0°C

Humidity 69%
Wind Speed S 7 mph
Barometer 30.08 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 18 Mar 11:36 pm EDT
Extended Forecast for

2 Miles S Fort Gratiot MI

  • Tonight

    Tonight: Mostly cloudy, with a steady temperature around 33. South southwest wind 6 to 8 mph.

    Low: 33 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 44. West wind around 5 mph becoming light and variable.

    High: 44 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 32. Calm wind becoming south southeast around 5 mph after midnight.

    Low: 32 °F

    Mostly Cloudy

  • Friday

    Friday: Rain likely, mainly before 2pm. Mostly cloudy, with a high near 50. South wind 7 to 10 mph becoming west southwest in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 50 °F

    Rain Likely

  • Friday Night

    Friday Night: A chance of rain before 8pm. Mostly cloudy, with a low around 35. North northwest wind around 6 mph. Chance of precipitation is 30%.

    Low: 35 °F

    Chance Rain
    then Mostly
    Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 52.

    High: 52 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A chance of rain after 2am. Mostly cloudy, with a low around 36. Chance of precipitation is 30%.

    Low: 36 °F

    Mostly Cloudy
    then Chance
    Rain

  • Sunday

    Sunday: A chance of rain before 2pm. Mostly cloudy, with a high near 47.

    High: 47 °F

    Chance Rain

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a steady temperature around 33. South southwest wind 6 to 8 mph.
Thursday
Partly sunny, with a high near 44. West wind around 5 mph becoming light and variable.
Thursday Night
Mostly cloudy, with a low around 32. Calm wind becoming south southeast around 5 mph after midnight.
Friday
Rain likely, mainly before 2pm. Mostly cloudy, with a high near 50. South wind 7 to 10 mph becoming west southwest in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A chance of rain before 8pm. Mostly cloudy, with a low around 35. North northwest wind around 6 mph. Chance of precipitation is 30%.
Saturday
Mostly cloudy, with a high near 52.
Saturday Night
A chance of rain after 2am. Mostly cloudy, with a low around 36. Chance of precipitation is 30%.
Sunday
A chance of rain before 2pm. Mostly cloudy, with a high near 47.
Sunday Night
Mostly cloudy, with a low around 27.
Monday
Mostly sunny, with a high near 35.
Monday Night
Partly cloudy, with a low around 24.
Tuesday
Partly sunny, with a high near 43.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
Mostly cloudy, with a high near 44.
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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:
7:13 pm EDT Mar 18, 2026
Forecast Valid:
11pm EDT Mar 18, 2026-6pm EDT Mar 25, 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