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.

Rain

59°F

15°C

Humidity 94%
Wind Speed W 3 mph
Barometer 29.67 in
Dewpoint 57°F (14°C)
Visibility 5.00 mi
Last update 4 Sep 3:15 am EDT
Extended Forecast for

Saint Clair MI

  • Overnight

    Overnight: Showers and possibly a thunderstorm before 5am, then a chance of showers and thunderstorms after 5am. Some of the storms could produce heavy rainfall. Low around 52. West northwest wind around 6 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 52 °F

    Heavy Rain

  • Thursday

    Thursday: A chance of showers before 8am. Cloudy through mid morning, then gradual clearing, with a high near 66. North northwest wind around 8 mph. Chance of precipitation is 30%.

    High: 66 °F

    Chance
    Showers then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 48. Calm wind.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 72. Breezy, with a south wind 11 to 20 mph, with gusts as high as 29 mph.

    High: 72 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 47. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 47 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Overnight
Showers and possibly a thunderstorm before 5am, then a chance of showers and thunderstorms after 5am. Some of the storms could produce heavy rainfall. Low around 52. West northwest wind around 6 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
A chance of showers before 8am. Cloudy through mid morning, then gradual clearing, with a high near 66. North northwest wind around 8 mph. Chance of precipitation is 30%.
Thursday Night
Mostly clear, with a low around 48. Calm wind.
Friday
Mostly sunny, with a high near 72. Breezy, with a south wind 11 to 20 mph, with gusts as high as 29 mph.
Friday Night
Mostly cloudy, with a low around 47. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Saturday
Partly sunny, with a high near 66.
Saturday Night
Partly cloudy, with a low around 45.
Sunday
Mostly sunny, with a high near 64.
Sunday Night
Partly cloudy, with a low around 43.
Monday
Sunny, with a high near 66.
Monday Night
Mostly clear, with a low around 46.
Tuesday
Sunny, with a high near 72.
Tuesday Night
Partly cloudy, with a low around 50.
Wednesday
Mostly sunny, with a high near 74.
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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:
3:13 am EDT Sep 4, 2025
Forecast Valid:
3am EDT Sep 4, 2025-6pm EDT Sep 10, 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