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

37°F

3°C

Humidity 70%
Wind Speed Calm
Barometer 30.08 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 18 Nov 5:55 pm EST
Extended Forecast for

4 Miles S Port Sanilac MI

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 30. Calm wind becoming north 5 to 7 mph in the evening.

    Low: 30 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 42. North wind around 6 mph.

    High: 42 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Cloudy, then gradually becoming partly cloudy, with a low around 31. Calm wind becoming south southwest around 5 mph after midnight.

    Low: 31 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Partly sunny, with a high near 47. South wind 6 to 11 mph.

    High: 47 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A chance of rain. Mostly cloudy, with a low around 39. South southwest wind around 10 mph. Chance of precipitation is 50%.

    Low: 39 °F

    Chance Rain

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 48.

    High: 48 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 44.

    High: 44 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 30. Calm wind becoming north 5 to 7 mph in the evening.
Wednesday
Partly sunny, with a high near 42. North wind around 6 mph.
Wednesday Night
Cloudy, then gradually becoming partly cloudy, with a low around 31. Calm wind becoming south southwest around 5 mph after midnight.
Thursday
Partly sunny, with a high near 47. South wind 6 to 11 mph.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 39. South southwest wind around 10 mph. Chance of precipitation is 50%.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 48.
Friday Night
Partly cloudy, with a low around 32.
Saturday
Mostly sunny, with a high near 44.
Saturday Night
Mostly cloudy, with a low around 34.
Sunday
Mostly sunny, with a high near 49.
Sunday Night
Mostly cloudy, with a low around 35.
Monday
Partly sunny, with a high near 50.
Monday Night
Partly cloudy, with a low around 35.
Tuesday
A chance of rain. Partly sunny, with a high near 47.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Port Sanilac MI
 43.37°N 82.56°W (Elev. 650 ft)
Last Update:
4:13 pm EST Nov 18, 2025
Forecast Valid:
6pm EST Nov 18, 2025-6pm EST Nov 25, 2025
 
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