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

45°F

7°C

Humidity 81%
Wind Speed W 17 G 22 mph
Barometer 29.55 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 11 Mar 4:36 pm EDT
Extended Forecast for

Casco MI

  • This Afternoon

    This Afternoon: A chance of rain. Mostly cloudy, with a high near 58. West wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.

    High: 58 °F

    Chance Rain

  • Tonight

    Tonight: A chance of rain before 8pm. Mostly cloudy, with a low around 28. West northwest wind around 17 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.

    Low: 28 °F

    Chance Rain
    then Mostly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 40. West northwest wind 10 to 14 mph, with gusts as high as 23 mph.

    High: 40 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Snow likely after 2am, mixing with rain after 5am. Increasing clouds, with a low around 30. West northwest wind 5 to 14 mph becoming south after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 30 °F

    Partly Cloudy
    then
    Rain/Snow
    Likely

  • Friday

    Friday: Rain and snow likely before 11am, then a chance of rain between 11am and 2pm. Mostly cloudy, with a high near 44. Windy, with a west southwest wind 23 to 28 mph, with gusts as high as 46 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 44 °F

    Windy.
    Rain/Snow
    Likely then
    Chance Rain

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 25. Breezy.

    Low: 25 °F

    Mostly Cloudy
    and Breezy

  • Saturday

    Saturday: Partly sunny, with a high near 38.

    High: 38 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of snow after 2am. Increasing clouds, with a low around 28.

    Low: 28 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: Rain and snow. Cloudy, with a high near 48.

    High: 48 °F

    Rain/Snow

Detailed Forecast

This Afternoon
A chance of rain. Mostly cloudy, with a high near 58. West wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.
Tonight
A chance of rain before 8pm. Mostly cloudy, with a low around 28. West northwest wind around 17 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 40. West northwest wind 10 to 14 mph, with gusts as high as 23 mph.
Thursday Night
Snow likely after 2am, mixing with rain after 5am. Increasing clouds, with a low around 30. West northwest wind 5 to 14 mph becoming south after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday
Rain and snow likely before 11am, then a chance of rain between 11am and 2pm. Mostly cloudy, with a high near 44. Windy, with a west southwest wind 23 to 28 mph, with gusts as high as 46 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday Night
Mostly cloudy, with a low around 25. Breezy.
Saturday
Partly sunny, with a high near 38.
Saturday Night
A chance of snow after 2am. Increasing clouds, with a low around 28.
Sunday
Rain and snow. Cloudy, with a high near 48.
Sunday Night
Rain and snow likely before 8pm, then rain between 8pm and 2am, then rain and snow likely after 2am. Cloudy, with a low around 28. Breezy.
Monday
Rain and snow likely. Mostly cloudy, with a high near 32. Breezy.
Monday Night
Mostly cloudy, with a low around 15.
Tuesday
Mostly cloudy, with a high near 27.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Casco MI
 42.74°N 82.67°W (Elev. 630 ft)
Last Update:
4:24 pm EDT Mar 11, 2026
Forecast Valid:
4pm EDT Mar 11, 2026-6pm EDT Mar 17, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation