Current conditions at

St Clair County International Airport (KPHN)

Lat: 42.91°NLon: 82.53°WElev: 636ft.

Light Rain

68°F

20°C

Humidity 88%
Wind Speed N 6 mph
Barometer 29.78 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 2 Aug 8:35 am EDT
Extended Forecast for

3 Miles S Fort Gratiot MI

Flood Watch until August 2, 05:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until August 2, 05:00pm

    NOW until 5:00pm Sun

    Flood Watch

  • Today

    High: 74 °F

    Heavy Rain

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 61. North northeast wind 9 to 15 mph, with gusts as high as 26 mph.

    Low: 61 °F

    Decreasing
    Clouds

  • Monday

    Monday: Sunny, with a high near 75. North wind 10 to 13 mph, with gusts as high as 20 mph.

    High: 75 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 58. North wind 5 to 7 mph becoming calm  in the evening.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 82. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers after 2am.  Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Today
Showers before 2pm, then showers likely and possibly a thunderstorm between 2pm and 3pm, then a chance of showers and thunderstorms after 3pm. Some of the storms could produce heavy rainfall. High near 74. North northeast wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 61. North northeast wind 9 to 15 mph, with gusts as high as 26 mph.
Monday
Sunny, with a high near 75. North wind 10 to 13 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 58. North wind 5 to 7 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 82. Calm wind becoming south southeast around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Sunny, with a high near 85.
Wednesday Night
A chance of showers after 2am. Partly cloudy, with a low around 64.
Thursday
A chance of showers before 8am, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 79.
Thursday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 63.
Friday
Partly sunny, with a high near 82.
Friday Night
Partly cloudy, with a low around 64.
Saturday
Partly sunny, with a high near 84.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Fort Gratiot MI
 43.04°N 82.48°W (Elev. 620 ft)
4:24 am EDT Aug 2, 2026
8am EDT Aug 2, 2026-6pm EDT Aug 8, 2026
 
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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