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.

Drizzle

66°F

19°C

Humidity 88%
Wind Speed N 6 mph
Barometer 30.24 in
Dewpoint 63°F (17°C)
Visibility 4.00 mi
Last update 17 Sep 2:15 pm EDT
Extended Forecast for

3 Miles S Fort Gratiot MI

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 71. North wind around 8 mph.

    High: 71 °F

    Mostly Cloudy

  • Tonight

    Tonight: Partly cloudy, with a low around 60. North wind around 7 mph.

    Low: 60 °F

    Partly Cloudy

  • Friday

    Friday: Increasing clouds, with a high near 67. North northeast wind 8 to 11 mph, with gusts as high as 20 mph.

    High: 67 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 55. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 55 °F

    Mostly Cloudy

  • Saturday

    Saturday: Showers likely, mainly after 2pm. Cloudy, with a high near 66. East southeast wind 5 to 7 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    High: 66 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely. Cloudy, with a low around 56. Chance of precipitation is 60%.

    Low: 56 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers before 2pm. Mostly cloudy, with a high near 65. Chance of precipitation is 30%.

    High: 65 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 62.

    High: 62 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 71. North wind around 8 mph.
Tonight
Partly cloudy, with a low around 60. North wind around 7 mph.
Friday
Increasing clouds, with a high near 67. North northeast wind 8 to 11 mph, with gusts as high as 20 mph.
Friday Night
Mostly cloudy, with a low around 55. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday
Showers likely, mainly after 2pm. Cloudy, with a high near 66. East southeast wind 5 to 7 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
Showers likely. Cloudy, with a low around 56. Chance of precipitation is 60%.
Sunday
A chance of showers before 2pm. Mostly cloudy, with a high near 65. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 54.
Monday
Mostly cloudy, with a high near 62.
Monday Night
Mostly cloudy, with a low around 52.
Tuesday
Partly sunny, with a high near 63.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 53.
Wednesday
A chance of showers. Partly sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Fort Gratiot MI
 43.04°N 82.48°W (Elev. 620 ft)
Last Update:
2:24 pm EDT Sep 17, 2026
Forecast Valid:
2pm EDT Sep 17, 2026-6pm EDT Sep 23, 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