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.

Fog/Mist

61°F

16°C

Humidity 94%
Wind Speed E 2 mph
Barometer 29.95 in
Dewpoint 59°F (15°C)
Visibility 1.25 mi
Last update 11 Oct 4:35 pm EDT
Extended Forecast for

Saint Clair MI

  • This Afternoon

    This Afternoon: A slight chance of rain before 5pm. Cloudy, with a high near 67. East southeast wind around 6 mph. Chance of precipitation is 20%.

    High: 67 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: Areas of fog after 2am. Otherwise, mostly cloudy, with a low around 54. Calm wind.

    Low: 54 °F

    Mostly Cloudy
    then Areas
    Fog

  • Columbus Day

    Columbus Day: Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 76. Light southwest wind becoming south southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 76 °F

    Patchy Fog
    then Partly
    Sunny

  • Monday Night

    Monday Night: A chance of rain after 2am. Mostly cloudy, with a low around 64. South southwest wind around 8 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

    Low: 64 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tuesday

    Tuesday: A chance of rain before 8am. Partly sunny through mid morning, then becoming sunny, with a high near 81. South southwest wind 9 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    High: 81 °F

    Chance Rain
    then Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 68.

    High: 68 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 49.

    Low: 49 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 64.

    High: 64 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A slight chance of rain before 5pm. Cloudy, with a high near 67. East southeast wind around 6 mph. Chance of precipitation is 20%.
Tonight
Areas of fog after 2am. Otherwise, mostly cloudy, with a low around 54. Calm wind.
Columbus Day
Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 76. Light southwest wind becoming south southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Monday Night
A chance of rain after 2am. Mostly cloudy, with a low around 64. South southwest wind around 8 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Tuesday
A chance of rain before 8am. Partly sunny through mid morning, then becoming sunny, with a high near 81. South southwest wind 9 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Tuesday Night
Partly cloudy, with a low around 56.
Wednesday
Mostly cloudy, with a high near 68.
Wednesday Night
Mostly cloudy, with a low around 49.
Thursday
Partly sunny, with a high near 64.
Thursday Night
Rain likely after 8pm. Mostly cloudy, with a low around 48.
Friday
A chance of rain. Mostly cloudy, with a high near 62. Breezy.
Friday Night
Mostly cloudy, with a low around 35. Breezy.
Saturday
Partly sunny, with a high near 50. Breezy.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Clair MI
 42.82°N 82.48°W (Elev. 577 ft)
Last Update:
4:24 pm EDT Oct 11, 2026
Forecast Valid:
4pm EDT Oct 11, 2026-6pm EDT Oct 17, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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