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.

Overcast

50°F

10°C

Humidity 43%
Wind Speed S 6 mph
Barometer 29.82 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 25 Mar 10:55 pm EDT
Extended Forecast for

2 Miles S Fort Gratiot MI

  • Tonight

    Tonight: Mostly cloudy, with a low around 43. Southwest wind around 9 mph, with gusts as high as 18 mph.

    Low: 43 °F

    Mostly Cloudy

  • Thursday

    Thursday: Rain likely, mainly after 5pm. Mostly cloudy, with a high near 56. West southwest wind 6 to 9 mph becoming northeast in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 56 °F

    Chance Rain
    then Rain
    Likely

  • Thursday Night

    Thursday Night: Rain, mainly before 8pm. Low around 27. North wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 27 °F

    Rain then
    Chance Rain

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 31. North wind around 14 mph, with gusts as high as 23 mph.

    High: 31 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 20. North wind 5 to 9 mph.

    Low: 20 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 50.

    High: 50 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 43. Southwest wind around 9 mph, with gusts as high as 18 mph.
Thursday
Rain likely, mainly after 5pm. Mostly cloudy, with a high near 56. West southwest wind 6 to 9 mph becoming northeast in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Rain, mainly before 8pm. Low around 27. North wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 31. North wind around 14 mph, with gusts as high as 23 mph.
Friday Night
Mostly clear, with a low around 20. North wind 5 to 9 mph.
Saturday
Mostly sunny, with a high near 40.
Saturday Night
Partly cloudy, with a low around 28.
Sunday
Partly sunny, with a high near 50.
Sunday Night
Mostly cloudy, with a low around 41.
Monday
Partly sunny, with a high near 57.
Monday Night
A chance of rain. Mostly cloudy, with a low around 37.
Tuesday
A chance of rain. Mostly cloudy, with a high near 50.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 40.
Wednesday
A chance of rain. Mostly cloudy, with a high near 59.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Fort Gratiot MI
 43.04°N 82.48°W (Elev. 620 ft)
Last Update:
9:24 pm EDT Mar 25, 2026
Forecast Valid:
11pm EDT Mar 25, 2026-6pm EDT Apr 1, 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