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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

2 Miles S Fort Gratiot MI

Freeze Watch April 19, 11:00pm until April 20, 11:00am
Frost Advisory April 19, 02:00am until April 19, 10:00am
Click here for hazard details and duration
Freeze Watch
Frost Advisory

  • Tonight

    Tonight: Partly cloudy, with a low around 34. West wind 8 to 11 mph, with gusts as high as 23 mph.

    Low: 34 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers, mainly after 2pm. Increasing clouds, with a high near 47. West wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.

    High: 47 °F

    Sunny then
    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of rain and snow showers before 7pm, then a chance of snow showers between 7pm and 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 26. Northwest wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 26 °F

    Chance
    Rain/Snow
    then Partly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 41. Northwest wind 7 to 9 mph.

    High: 41 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 31. South wind 3 to 8 mph.

    Low: 31 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 41 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 34. West wind 8 to 11 mph, with gusts as high as 23 mph.
Sunday
A chance of showers, mainly after 2pm. Increasing clouds, with a high near 47. West wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.
Sunday Night
A chance of rain and snow showers before 7pm, then a chance of snow showers between 7pm and 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 26. Northwest wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 41. Northwest wind 7 to 9 mph.
Monday Night
Partly cloudy, with a low around 31. South wind 3 to 8 mph.
Tuesday
Mostly sunny, with a high near 62.
Tuesday Night
Mostly cloudy, with a low around 41.
Wednesday
Mostly sunny, with a high near 56.
Wednesday Night
Mostly clear, with a low around 40.
Thursday
Sunny, with a high near 69.
Thursday Night
Partly cloudy, with a low around 50.
Friday
A chance of showers. Mostly sunny, with a high near 71.
Friday Night
A chance of showers. Mostly cloudy, with a low around 47.
Saturday
A chance of showers. Mostly cloudy, with a high near 60.
Basemap Options
Click map to change the forecast location
Loading map...
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:
10:14 pm EDT Apr 18, 2026
Forecast Valid:
11pm EDT Apr 18, 2026-6pm EDT Apr 25, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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