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.

Fair

34°F

1°C

Humidity 75%
Wind Speed Calm
Barometer 30.04 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 14 Feb 6:15 pm EST
Extended Forecast for

2 Miles S Fort Gratiot MI

  • Tonight

    Tonight: Patchy freezing fog after 10pm. Mostly cloudy, with a low around 25. Calm wind.

    Low: 25 °F

    Patchy
    Freezing Fog

  • Sunday

    Sunday: Patchy freezing fog before 8am. Partly sunny, with a high near 41. South southeast wind 3 to 6 mph.

    High: 41 °F

    Patchy
    Freezing Fog
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 27. Light west wind.

    Low: 27 °F

    Partly Cloudy

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 43. Calm wind becoming south 5 to 9 mph in the morning.

    High: 43 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 33. South southwest wind 5 to 7 mph.

    Low: 33 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 44.

    High: 44 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Rain likely after 1am. Mostly cloudy, with a low around 36. Chance of precipitation is 60%.

    Low: 36 °F

    Mostly Cloudy
    then Rain
    Likely

  • Wednesday

    Wednesday: Rain, mainly before 1pm. Mostly cloudy, with a high near 52.

    High: 52 °F

    Rain

  • Wednesday Night

    Wednesday Night: A chance of rain before 1am. Partly cloudy, with a low around 35.

    Low: 35 °F

    Chance Rain

Detailed Forecast

Tonight
Patchy freezing fog after 10pm. Mostly cloudy, with a low around 25. Calm wind.
Sunday
Patchy freezing fog before 8am. Partly sunny, with a high near 41. South southeast wind 3 to 6 mph.
Sunday Night
Partly cloudy, with a low around 27. Light west wind.
Washington's Birthday
Partly sunny, with a high near 43. Calm wind becoming south 5 to 9 mph in the morning.
Monday Night
Partly cloudy, with a low around 33. South southwest wind 5 to 7 mph.
Tuesday
Mostly cloudy, with a high near 44.
Tuesday Night
Rain likely after 1am. Mostly cloudy, with a low around 36. Chance of precipitation is 60%.
Wednesday
Rain, mainly before 1pm. Mostly cloudy, with a high near 52.
Wednesday Night
A chance of rain before 1am. Partly cloudy, with a low around 35.
Thursday
Mostly sunny, with a high near 48.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 30.
Friday
A chance of rain. Mostly cloudy, with a high near 39.
Friday Night
Mostly cloudy, with a low around 25.
Saturday
Partly sunny, with a high near 34.
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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:
3:35 pm EST Feb 14, 2026
Forecast Valid:
6pm EST Feb 14, 2026-6pm EST Feb 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation