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

30°F

-1°C

Humidity 69%
Wind Speed SW 6 G 17 mph
Barometer 30.12 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 12 Jan 4:15 am EST
Extended Forecast for

Casco MI

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 37. West southwest wind 11 to 14 mph, with gusts as high as 25 mph.

    High: 37 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Partly cloudy, with a low around 27. West southwest wind 6 to 8 mph.

    Low: 27 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of rain after 1pm. Mostly cloudy, with a high near 40. South southwest wind 9 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 40 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: A chance of rain before 1am. Mostly cloudy, with a low around 32. Southwest wind 7 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.

    Low: 32 °F

    Chance Rain

  • Wednesday

    Wednesday: Rain and snow likely before 1pm, then snow. High near 37. West southwest wind 7 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 37 °F

    Rain/Snow

  • Wednesday Night

    Wednesday Night: Snow likely, mainly before 1am. Mostly cloudy, with a low around 15. Chance of precipitation is 60%.

    Low: 15 °F

    Snow Likely

  • Thursday

    Thursday: Mostly cloudy, with a high near 23.

    High: 23 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of snow. Mostly cloudy, with a high near 29.

    High: 29 °F

    Chance Snow

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 37. West southwest wind 11 to 14 mph, with gusts as high as 25 mph.
Tonight
Partly cloudy, with a low around 27. West southwest wind 6 to 8 mph.
Tuesday
A chance of rain after 1pm. Mostly cloudy, with a high near 40. South southwest wind 9 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Tuesday Night
A chance of rain before 1am. Mostly cloudy, with a low around 32. Southwest wind 7 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.
Wednesday
Rain and snow likely before 1pm, then snow. High near 37. West southwest wind 7 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Wednesday Night
Snow likely, mainly before 1am. Mostly cloudy, with a low around 15. Chance of precipitation is 60%.
Thursday
Mostly cloudy, with a high near 23.
Thursday Night
Mostly cloudy, with a low around 15.
Friday
A chance of snow. Mostly cloudy, with a high near 29.
Friday Night
A chance of snow. Mostly cloudy, with a low around 22.
Saturday
A chance of snow. Mostly cloudy, with a high near 30.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 12.
Sunday
A chance of snow. Mostly cloudy, with a high near 21.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Casco MI
 42.74°N 82.67°W (Elev. 630 ft)
Last Update:
4:13 am EST Jan 12, 2026
Forecast Valid:
4am EST Jan 12, 2026-6pm EST Jan 18, 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