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

68°F

20°C

Humidity 64%
Wind Speed NW 5 mph
Barometer 29.98 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 24 Aug 4:15 pm EDT
Extended Forecast for

2 Miles WSW Fort Gratiot MI

  • This Afternoon

    This Afternoon: Cloudy, with a high near 72. Northwest wind 11 to 13 mph, with gusts as high as 21 mph.

    High: 72 °F

    Cloudy

  • Tonight

    Tonight: Cloudy, then gradually becoming partly cloudy, with a low around 56. North northwest wind around 5 mph becoming calm.

    Low: 56 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77. Northwest wind around 5 mph becoming east northeast in the afternoon.

    High: 77 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 60. Light and variable wind becoming southeast around 5 mph after midnight.

    Low: 60 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 80. South southwest wind 6 to 13 mph, with gusts as high as 21 mph.

    High: 80 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 11pm, then showers likely between 11pm and 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 70%.

    Low: 62 °F

    Showers
    Likely

  • Thursday

    Thursday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

Detailed Forecast

This Afternoon
Cloudy, with a high near 72. Northwest wind 11 to 13 mph, with gusts as high as 21 mph.
Tonight
Cloudy, then gradually becoming partly cloudy, with a low around 56. North northwest wind around 5 mph becoming calm.
Tuesday
Mostly sunny, with a high near 77. Northwest wind around 5 mph becoming east northeast in the afternoon.
Tuesday Night
Partly cloudy, with a low around 60. Light and variable wind becoming southeast around 5 mph after midnight.
Wednesday
Mostly sunny, with a high near 80. South southwest wind 6 to 13 mph, with gusts as high as 21 mph.
Wednesday Night
Showers likely and possibly a thunderstorm before 11pm, then showers likely between 11pm and 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 70%.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
Partly cloudy, with a low around 60.
Friday
Sunny, with a high near 76.
Friday Night
Mostly clear, with a low around 56.
Saturday
Mostly sunny, with a high near 79.
Saturday Night
Partly cloudy, with a low around 60.
Sunday
Partly sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Fort Gratiot MI
 43.06°N 82.54°W (Elev. 669 ft)
Last Update:
4:24 pm EDT Aug 24, 2026
Forecast Valid:
4pm EDT Aug 24, 2026-6pm EDT Aug 30, 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