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.

Fog/Mist

41°F

5°C

Humidity 100%
Wind Speed Calm
Barometer 30.22 in
Dewpoint 41°F (5°C)
Visibility 0.75 mi
Last update 25 May 1:35 am EDT
Extended Forecast for

Saint Clair MI

  • Overnight

    Overnight: Mostly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 61. Calm wind becoming north 5 to 8 mph in the morning.

    High: 61 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 43. North northeast wind around 6 mph becoming calm in the evening.

    Low: 43 °F

    Mostly Clear

  • Memorial Day

    Memorial Day: Sunny, with a high near 67. North northeast wind 3 to 7 mph.

    High: 67 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 47. North northeast wind around 6 mph becoming calm in the evening.

    Low: 47 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 71.

    High: 71 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A chance of showers after 2am. Mostly cloudy, with a low around 55. Chance of precipitation is 30%.

    Low: 55 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers. Mostly cloudy, with a high near 66.

    High: 66 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers before 2am. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 42. Calm wind.
Sunday
Partly sunny, with a high near 61. Calm wind becoming north 5 to 8 mph in the morning.
Sunday Night
Mostly clear, with a low around 43. North northeast wind around 6 mph becoming calm in the evening.
Memorial Day
Sunny, with a high near 67. North northeast wind 3 to 7 mph.
Monday Night
Increasing clouds, with a low around 47. North northeast wind around 6 mph becoming calm in the evening.
Tuesday
Mostly cloudy, with a high near 71.
Tuesday Night
A chance of showers after 2am. Mostly cloudy, with a low around 55. Chance of precipitation is 30%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 66.
Wednesday Night
A chance of showers before 2am. Mostly cloudy, with a low around 54.
Thursday
A chance of showers after 2pm. Mostly cloudy, with a high near 69.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 54.
Friday
A chance of showers. Mostly sunny, with a high near 74.
Friday Night
A chance of showers. Partly cloudy, with a low around 52.
Saturday
Mostly sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Clair MI
 42.8°N 82.48°W (Elev. 577 ft)
Last Update:
6:13 pm EDT May 24, 2025
Forecast Valid:
1am EDT May 25, 2025-6pm EDT May 31, 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