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.

Fair

68°F

20°C

Humidity 73%
Wind Speed N 6 mph
Barometer 30.29 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 18 Sep 10:16 am EDT
Extended Forecast for

3 Miles N Fort Gratiot MI

  • Today

    Today: Mostly sunny, with a high near 67. North northeast wind 11 to 14 mph, with gusts as high as 21 mph.

    High: 67 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 55. North northeast wind 7 to 13 mph, with gusts as high as 21 mph.

    Low: 55 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of showers before 4pm. Cloudy, with a high near 66. East southeast wind 6 to 8 mph. Chance of precipitation is 50%.

    High: 66 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers after 8pm. Cloudy, with a low around 55. East wind around 7 mph. Chance of precipitation is 30%.

    Low: 55 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers before 2pm. Mostly cloudy, with a high near 64. Northeast wind 9 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.

    High: 64 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 62.

    High: 62 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Cloudy, with a low around 50.

    Low: 50 °F

    Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 61.

    High: 61 °F

    Mostly Cloudy

Detailed Forecast

Today
Mostly sunny, with a high near 67. North northeast wind 11 to 14 mph, with gusts as high as 21 mph.
Tonight
Mostly cloudy, with a low around 55. North northeast wind 7 to 13 mph, with gusts as high as 21 mph.
Saturday
A chance of showers before 4pm. Cloudy, with a high near 66. East southeast wind 6 to 8 mph. Chance of precipitation is 50%.
Saturday Night
A chance of showers after 8pm. Cloudy, with a low around 55. East wind around 7 mph. Chance of precipitation is 30%.
Sunday
A chance of showers before 2pm. Mostly cloudy, with a high near 64. Northeast wind 9 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 52.
Monday
Mostly cloudy, with a high near 62.
Monday Night
Cloudy, with a low around 50.
Tuesday
Mostly cloudy, with a high near 61.
Tuesday Night
A chance of showers after 8pm. Mostly cloudy, with a low around 51.
Wednesday
A chance of showers. Partly sunny, with a high near 63.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 51.
Thursday
Mostly cloudy, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Fort Gratiot MI
 43.1°N 82.5°W (Elev. 614 ft)
Last Update:
4:24 am EDT Sep 18, 2026
Forecast Valid:
10am EDT Sep 18, 2026-6pm EDT Sep 24, 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