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.

Fair

77°F

25°C

Humidity 51%
Wind Speed S 7 mph
Barometer 30.12 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 5 Oct 6:35 pm EDT
Extended Forecast for

3 Miles N Fort Gratiot MI

  • Tonight

    Tonight: Mostly clear, with a low around 61. South wind 7 to 10 mph, with gusts as high as 18 mph.

    Low: 61 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 81. South southwest wind 8 to 13 mph, with gusts as high as 21 mph.

    High: 81 °F

    Sunny

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers after 2am. Low around 57. South southwest wind 8 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 57 °F

    Chance
    T-storms then
    Showers

  • Tuesday

    Tuesday: Showers, mainly before 2pm. High near 65. North wind 9 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 65 °F

    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers before 8pm. Partly cloudy, with a low around 47. North northwest wind 9 to 11 mph. Chance of precipitation is 30%.

    Low: 47 °F

    Chance
    Showers then
    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 61. South wind 7 to 10 mph, with gusts as high as 18 mph.
Monday
Sunny, with a high near 81. South southwest wind 8 to 13 mph, with gusts as high as 21 mph.
Monday Night
A chance of showers and thunderstorms, then showers after 2am. Low around 57. South southwest wind 8 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
Showers, mainly before 2pm. High near 65. North wind 9 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
A chance of showers before 8pm. Partly cloudy, with a low around 47. North northwest wind 9 to 11 mph. Chance of precipitation is 30%.
Wednesday
Sunny, with a high near 58.
Wednesday Night
Mostly clear, with a low around 41.
Thursday
Sunny, with a high near 58.
Thursday Night
Mostly clear, with a low around 42.
Friday
Sunny, with a high near 63.
Friday Night
Mostly clear, with a low around 47.
Saturday
Sunny, with a high near 64.
Saturday Night
Mostly clear, with a low around 48.
Sunday
Sunny, with a high near 67.
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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:
5:13 pm EDT Oct 5, 2025
Forecast Valid:
6pm EDT Oct 5, 2025-6pm EDT Oct 12, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation