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.

Fog/Mist

63°F

17°C

Humidity 100%
Wind Speed Calm
Barometer 30.08 in
Dewpoint 63°F (17°C)
Visibility 2.50 mi
Last update 15 Jul 12:35 am EDT
Extended Forecast for

Fort Gratiot MI

  • Overnight

    Overnight: Mostly clear, with a low around 65. Light south southwest wind.

    Low: 65 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 87. Calm wind becoming south around 6 mph in the afternoon.

    High: 87 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67. South wind around 6 mph.

    Low: 67 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 11am. Mostly sunny, with a high near 85. South wind 5 to 7 mph. Chance of precipitation is 50%.

    High: 85 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers. Partly cloudy, with a low around 71. South wind around 6 mph. Chance of precipitation is 40%.

    Low: 71 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers likely before 11am, then showers likely and possibly a thunderstorm between 11am and 2pm, then showers and thunderstorms likely after 2pm. Partly sunny, with a high near 81. Chance of precipitation is 70%.

    High: 81 °F

    Showers
    Likely then
    T-storms
    Likely

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.

    Low: 62 °F

    T-storms
    Likely then
    Chance
    Showers

  • Friday

    Friday: Partly sunny, with a high near 74.

    High: 74 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 65. Light south southwest wind.
Tuesday
Sunny, with a high near 87. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 67. South wind around 6 mph.
Wednesday
A chance of showers, with thunderstorms also possible after 11am. Mostly sunny, with a high near 85. South wind 5 to 7 mph. Chance of precipitation is 50%.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 71. South wind around 6 mph. Chance of precipitation is 40%.
Thursday
Showers likely before 11am, then showers likely and possibly a thunderstorm between 11am and 2pm, then showers and thunderstorms likely after 2pm. Partly sunny, with a high near 81. Chance of precipitation is 70%.
Thursday Night
Showers and thunderstorms likely before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.
Friday
Partly sunny, with a high near 74.
Friday Night
Mostly clear, with a low around 60.
Saturday
Mostly sunny, with a high near 80.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 65.
Sunday
A chance of showers. Partly sunny, with a high near 81.
Sunday Night
A chance of showers. Partly cloudy, with a low around 64.
Monday
Mostly sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fort Gratiot MI
 43.08°N 82.5°W (Elev. 623 ft)
Last Update:
12:24 am EDT Jul 15, 2025
Forecast Valid:
12am EDT Jul 15, 2025-6pm EDT Jul 21, 2025
 
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