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.

Freezing Fog

25°F

-4°C

Humidity 93%
Wind Speed Calm
Barometer 30.22 in
Dewpoint 23°F (-5°C)
Visibility 0.50 mi
Last update 4 Mar 12:55 am EST
Extended Forecast for

2 Miles S Fort Gratiot MI

  • Overnight

    Overnight: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 25. Calm wind.

    Low: 25 °F

    Patchy Fog

  • Wednesday

    Wednesday: Areas of fog before 8am. Otherwise, mostly sunny, with a high near 46. Calm wind becoming east around 5 mph.

    High: 46 °F

    Areas Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 31. Calm wind.

    Low: 31 °F

    Mostly Cloudy

  • Thursday

    Thursday: Rain, mainly after 1pm. High near 44. East wind 3 to 7 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 44 °F

    Chance Rain
    then Rain

  • Thursday Night

    Thursday Night: A chance of rain before 1am. Cloudy, with a low around 37. East northeast wind 3 to 6 mph. Chance of precipitation is 50%.

    Low: 37 °F

    Chance Rain

  • Friday

    Friday: A chance of rain after 1pm. Mostly cloudy, with a high near 53. Chance of precipitation is 30%.

    High: 53 °F

    Cloudy then
    Chance Rain

  • Friday Night

    Friday Night: Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 47. Chance of precipitation is 70%.

    Low: 47 °F

    Rain Likely

  • Saturday

    Saturday: Rain, mainly before 1pm. Mostly cloudy, with a high near 62.

    High: 62 °F

    Rain

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 25. Calm wind.
Wednesday
Areas of fog before 8am. Otherwise, mostly sunny, with a high near 46. Calm wind becoming east around 5 mph.
Wednesday Night
Mostly cloudy, with a low around 31. Calm wind.
Thursday
Rain, mainly after 1pm. High near 44. East wind 3 to 7 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
A chance of rain before 1am. Cloudy, with a low around 37. East northeast wind 3 to 6 mph. Chance of precipitation is 50%.
Friday
A chance of rain after 1pm. Mostly cloudy, with a high near 53. Chance of precipitation is 30%.
Friday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 47. Chance of precipitation is 70%.
Saturday
Rain, mainly before 1pm. Mostly cloudy, with a high near 62.
Saturday Night
Mostly cloudy, with a low around 35.
Sunday
Mostly sunny, with a high near 54.
Sunday Night
Mostly clear, with a low around 40.
Monday
Mostly sunny, with a high near 57.
Monday Night
Mostly clear, with a low around 43.
Tuesday
A chance of rain. Mostly sunny, with a high near 59.
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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:
12:35 am EST Mar 4, 2026
Forecast Valid:
1am EST Mar 4, 2026-6pm EDT Mar 10, 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