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

37°F

3°C

Humidity 93%
Wind Speed SW 1 mph
Barometer 30.12 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 9 Oct 4:56 am EDT
Extended Forecast for

3 Miles N Fort Gratiot MI

  • Today

    Today: Sunny, with a high near 66. West southwest wind 8 to 10 mph.

    High: 66 °F

    Sunny

  • Tonight

    Tonight: A slight chance of showers after 1am. Mostly clear, with a low around 52. Southeast wind 6 to 8 mph. Chance of precipitation is 20%.

    Low: 52 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 71. South southeast wind 11 to 15 mph, with gusts as high as 23 mph.

    High: 71 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 57. South southeast wind 10 to 13 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Rain, mainly before 2pm. High near 64. Southeast wind around 10 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 64 °F

    Rain

  • Sunday Night

    Sunday Night: A chance of rain before 8pm. Mostly cloudy, with a low around 55. Chance of precipitation is 30%.

    Low: 55 °F

    Chance Rain
    then Mostly
    Cloudy

  • Columbus Day

    Columbus Day: Partly sunny, with a high near 70.

    High: 70 °F

    Partly Sunny

  • Monday Night

    Monday Night: A chance of rain after 2am. Mostly cloudy, with a low around 56.

    Low: 56 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tuesday

    Tuesday: A chance of rain before 2pm. Partly sunny, with a high near 65.

    High: 65 °F

    Chance Rain

Detailed Forecast

Today
Sunny, with a high near 66. West southwest wind 8 to 10 mph.
Tonight
A slight chance of showers after 1am. Mostly clear, with a low around 52. Southeast wind 6 to 8 mph. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 71. South southeast wind 11 to 15 mph, with gusts as high as 23 mph.
Saturday Night
Increasing clouds, with a low around 57. South southeast wind 10 to 13 mph, with gusts as high as 20 mph.
Sunday
Rain, mainly before 2pm. High near 64. Southeast wind around 10 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
A chance of rain before 8pm. Mostly cloudy, with a low around 55. Chance of precipitation is 30%.
Columbus Day
Partly sunny, with a high near 70.
Monday Night
A chance of rain after 2am. Mostly cloudy, with a low around 56.
Tuesday
A chance of rain before 2pm. Partly sunny, with a high near 65.
Tuesday Night
Partly cloudy, with a low around 49.
Wednesday
Mostly sunny, with a high near 60.
Wednesday Night
Partly cloudy, with a low around 48.
Thursday
A chance of rain. Partly sunny, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Fort Gratiot MI
 43.12°N 82.5°W (Elev. 600 ft)
Last Update:
4:24 am EDT Oct 9, 2026
Forecast Valid:
5am EDT Oct 9, 2026-6pm EDT Oct 15, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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