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

64°F

18°C

Humidity 88%
Wind Speed Calm
Barometer 30.25 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 17 Sep 9:15 am EDT
Extended Forecast for

4 Miles S Port Sanilac MI

  • Today

    Today: Partly sunny, with a high near 70. North northeast wind 8 to 11 mph.

    High: 70 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 58. North wind around 8 mph.

    Low: 58 °F

    Partly Cloudy

  • Friday

    Friday: Increasing clouds, with a high near 68. North northeast wind 9 to 13 mph, with gusts as high as 20 mph.

    High: 68 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 57. North northeast wind 7 to 11 mph, with gusts as high as 18 mph.

    Low: 57 °F

    Mostly Cloudy

  • Saturday

    Saturday: Showers. High near 65. East southeast wind 8 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 65 °F

    Showers

  • Saturday Night

    Saturday Night: Showers. Low around 57. Chance of precipitation is 80%.

    Low: 57 °F

    Showers

  • Sunday

    Sunday: Showers likely before 8am. Mostly cloudy, with a high near 66. Breezy. Chance of precipitation is 60%.

    High: 66 °F

    Showers
    Likely then
    Mostly Cloudy
    and Breezy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 64.

    High: 64 °F

    Mostly Cloudy

Detailed Forecast

Today
Partly sunny, with a high near 70. North northeast wind 8 to 11 mph.
Tonight
Partly cloudy, with a low around 58. North wind around 8 mph.
Friday
Increasing clouds, with a high near 68. North northeast wind 9 to 13 mph, with gusts as high as 20 mph.
Friday Night
Mostly cloudy, with a low around 57. North northeast wind 7 to 11 mph, with gusts as high as 18 mph.
Saturday
Showers. High near 65. East southeast wind 8 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
Showers. Low around 57. Chance of precipitation is 80%.
Sunday
Showers likely before 8am. Mostly cloudy, with a high near 66. Breezy. Chance of precipitation is 60%.
Sunday Night
Mostly cloudy, with a low around 54.
Monday
Mostly cloudy, with a high near 64.
Monday Night
Mostly cloudy, with a low around 54.
Tuesday
Partly sunny, with a high near 66.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 56.
Wednesday
A chance of showers. Partly sunny, with a high near 69.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Port Sanilac MI
 43.37°N 82.56°W (Elev. 650 ft)
Last Update:
4:24 am EDT Sep 17, 2026
Forecast Valid:
9am EDT Sep 17, 2026-6pm EDT Sep 23, 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