National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St Clair County International Airport (KPHN)

Lat: 42.91°NLon: 82.53°WElev: 636ft.

Overcast

70°F

21°C

Humidity 78%
Wind Speed Calm
Barometer 29.94 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 10 Aug 5:16 am EDT
Extended Forecast for

Saint Clair MI

  • Overnight

    Overnight: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Light west southwest wind. Chance of precipitation is 20%.

    Low: 66 °F

    Slight Chance
    T-storms

  • Monday

    Monday: A chance of showers and thunderstorms, mainly before 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 85. West southwest wind 3 to 7 mph. Chance of precipitation is 40%.

    High: 85 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 63. Light and variable wind.

    Low: 63 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of showers after 2pm. Partly sunny, with a high near 82. Calm wind becoming east southeast around 5 mph. Chance of precipitation is 30%.

    High: 82 °F

    Partly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers before 8pm. Cloudy, then gradually becoming partly cloudy, with a low around 63. Calm wind. Chance of precipitation is 30%.

    Low: 63 °F

    Chance
    Showers then
    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms between 2pm and 5pm, then a chance of showers after 5pm. Mostly sunny, with a high near 83. Chance of precipitation is 50%.

    High: 83 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers before 8pm. Partly cloudy, with a low around 62. Chance of precipitation is 30%.

    Low: 62 °F

    Chance
    Showers then
    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 58.

    Low: 58 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Light west southwest wind. Chance of precipitation is 20%.
Monday
A chance of showers and thunderstorms, mainly before 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 85. West southwest wind 3 to 7 mph. Chance of precipitation is 40%.
Monday Night
Mostly cloudy, with a low around 63. Light and variable wind.
Tuesday
A chance of showers after 2pm. Partly sunny, with a high near 82. Calm wind becoming east southeast around 5 mph. Chance of precipitation is 30%.
Tuesday Night
A chance of showers before 8pm. Cloudy, then gradually becoming partly cloudy, with a low around 63. Calm wind. Chance of precipitation is 30%.
Wednesday
A chance of showers and thunderstorms between 2pm and 5pm, then a chance of showers after 5pm. Mostly sunny, with a high near 83. Chance of precipitation is 50%.
Wednesday Night
A chance of showers before 8pm. Partly cloudy, with a low around 62. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
Mostly cloudy, with a low around 58.
Friday
Mostly sunny, with a high near 77.
Friday Night
Partly cloudy, with a low around 56.
Saturday
A chance of showers. Mostly sunny, with a high near 78.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 59.
Sunday
A chance of showers. Partly sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Clair MI
 42.82°N 82.51°W (Elev. 600 ft)
Last Update:
4:25 am EDT Aug 10, 2026
Forecast Valid:
5am EDT Aug 10, 2026-6pm EDT Aug 16, 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