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.

N/A

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

Casco MI

  • Overnight

    Overnight: A chance of showers before 1am, then a chance of rain between 1am and 5am. Mostly cloudy, with a low around 39. Light north wind. Chance of precipitation is 30%.

    Low: 39 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of rain, mainly between 2pm and 5pm. Mostly cloudy, with a high near 48. North wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.

    High: 48 °F

    Chance Rain

  • Thursday Night

    Thursday Night: Rain and snow, becoming all snow after 3am. Low around 30. North wind 6 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 30 °F

    Rain/Snow

  • Friday

    Friday: Snow before 1pm, then rain. High near 42. North northwest wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    High: 42 °F

    Snow then
    Rain/Snow

  • Friday Night

    Friday Night: A chance of rain and snow before 10pm, then a chance of snow between 10pm and 1am. Mostly cloudy, with a low around 28. Northwest wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 28 °F

    Chance
    Rain/Snow
    then Chance
    Snow

  • Saturday

    Saturday: Partly sunny, with a high near 45.

    High: 45 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 47.

    High: 47 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A chance of showers before 1am, then a chance of rain between 1am and 5am. Mostly cloudy, with a low around 39. Light north wind. Chance of precipitation is 30%.
Thursday
A chance of rain, mainly between 2pm and 5pm. Mostly cloudy, with a high near 48. North wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
Thursday Night
Rain and snow, becoming all snow after 3am. Low around 30. North wind 6 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Friday
Snow before 1pm, then rain. High near 42. North northwest wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Friday Night
A chance of rain and snow before 10pm, then a chance of snow between 10pm and 1am. Mostly cloudy, with a low around 28. Northwest wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 45.
Saturday Night
Partly cloudy, with a low around 30.
Sunday
Partly sunny, with a high near 47.
Sunday Night
Mostly cloudy, with a low around 30.
Monday
Partly sunny, with a high near 47.
Monday Night
Partly cloudy, with a low around 29.
Tuesday
Mostly sunny, with a high near 48.
Tuesday Night
Mostly clear, with a low around 29.
Wednesday
Sunny, with a high near 50.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Casco MI
 42.74°N 82.67°W (Elev. 630 ft)
Last Update:
9:49 pm EST Nov 11, 2026
Forecast Valid:
12am EST Nov 12, 2026-6pm EST Nov 18, 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