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

55°F

13°C

Humidity 77%
Wind Speed N 9 mph
Barometer 30.17 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Wind Chill53°F (12°C)
Last update 14 Oct 9:55 pm EDT
Extended Forecast for

Saint Clair MI

  • Tonight

    Tonight: Mostly cloudy, with a low around 46. North northeast wind around 5 mph.

    Low: 46 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of rain, mainly after 4pm. Mostly cloudy, with a high near 61. East southeast wind 5 to 7 mph. Chance of precipitation is 30%.

    High: 61 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday Night

    Thursday Night: Rain before 2am, then rain after 4am. Low around 50. East wind 3 to 6 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 50 °F

    Rain

  • Friday

    Friday: Rain. High near 59. Northwest wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 59 °F

    Rain

  • Friday Night

    Friday Night: Rain, mainly before 8pm. Low around 37. North northwest wind 14 to 16 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 37 °F

    Rain then
    Chance Rain

  • Saturday

    Saturday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 36.

    Low: 36 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 46. North northeast wind around 5 mph.
Thursday
A chance of rain, mainly after 4pm. Mostly cloudy, with a high near 61. East southeast wind 5 to 7 mph. Chance of precipitation is 30%.
Thursday Night
Rain before 2am, then rain after 4am. Low around 50. East wind 3 to 6 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain. High near 59. Northwest wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Rain, mainly before 8pm. Low around 37. North northwest wind 14 to 16 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Sunny, with a high near 52.
Saturday Night
Clear, with a low around 36.
Sunday
Sunny, with a high near 61.
Sunday Night
Mostly clear, with a low around 42.
Monday
Mostly sunny, with a high near 65.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
Mostly sunny, with a high near 66.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Clair MI
 42.82°N 82.51°W (Elev. 600 ft)
Last Update:
4:24 pm EDT Oct 14, 2026
Forecast Valid:
10pm EDT Oct 14, 2026-6pm EDT Oct 21, 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