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

79°F

26°C

Humidity 45%
Wind Speed N 6 mph
Barometer 29.94 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 27 Aug 5:55 pm EDT
Extended Forecast for

Saint Clair MISimilar City Names

  • Tonight

    Tonight: Partly cloudy, with a low around 57. North northwest wind around 6 mph becoming calm in the evening.

    Low: 57 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 76. North wind 3 to 6 mph.

    High: 76 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 58. Light and variable wind.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 81. Calm wind becoming south southwest 5 to 8 mph in the morning.

    High: 81 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 65. South wind 3 to 6 mph.

    Low: 65 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 84.

    High: 84 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.

    Low: 68 °F

    Showers
    Likely

  • Monday

    Monday: Showers likely, mainly before 8am. Mostly cloudy, with a high near 87.

    High: 87 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A chance of showers after 2am. Mostly cloudy, with a low around 70.

    Low: 70 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 57. North northwest wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 76. North wind 3 to 6 mph.
Friday Night
Mostly clear, with a low around 58. Light and variable wind.
Saturday
Mostly sunny, with a high near 81. Calm wind becoming south southwest 5 to 8 mph in the morning.
Saturday Night
Mostly cloudy, with a low around 65. South wind 3 to 6 mph.
Sunday
Partly sunny, with a high near 84.
Sunday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Monday
Showers likely, mainly before 8am. Mostly cloudy, with a high near 87.
Monday Night
A chance of showers after 2am. Mostly cloudy, with a low around 70.
Tuesday
A chance of showers. Partly sunny, with a high near 89.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 69.
Wednesday
A chance of showers. Mostly sunny, with a high near 86.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 66.
Thursday
A chance of showers. Mostly sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Clair MISimilar City Names
 42.82°N 82.51°W (Elev. 600 ft)
Last Update:
4:24 pm EDT Aug 27, 2026
Forecast Valid:
6pm EDT Aug 27, 2026-6pm EDT Sep 3, 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