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.

Fair

12°C

54°F

Humidity 51%
Wind Speed S 19 G 30 km/h
Barometer 29.89 in
Dewpoint 2°C (36°F)
Visibility 16 km
Wind Chill10°C (50°F)
Last update 18 Mar 12:35 pm EDT
Extended Forecast for

Casco MI

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 15. South wind around 16 km/h, with gusts as high as 29 km/h.

    High: 15 °C

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 9. South wind 11 to 14 km/h.

    Low: 9 °C

    Mostly Cloudy

  • Wednesday

    Wednesday: Cloudy, then gradually becoming mostly sunny, with a high near 18. South wind 16 to 21 km/h increasing to 22 to 27 km/h in the afternoon. Winds could gust as high as 42 km/h.

    High: 18 °C

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Rain likely. Mostly cloudy, with a low around 4. South wind 24 to 26 km/h, with gusts as high as 45 km/h. Chance of precipitation is 70%. New precipitation amounts of less than 1 mm possible.

    Low: 4 °C

    Rain Likely

  • Thursday

    Thursday: Rain likely before 2pm, then a chance of rain and snow. Mostly cloudy, with a high near 9. South southwest wind 24 to 27 km/h becoming west northwest in the afternoon. Winds could gust as high as 45 km/h. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 9 °C

    Rain Likely
    then
    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: A chance of snow before 8pm. Mostly clear, with a low around -2. Chance of precipitation is 30%.

    Low: -2 °C

    Chance Snow
    then Mostly
    Clear

  • Friday

    Friday: Sunny, with a high near 11.

    High: 11 °C

    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 3.

    Low: 3 °C

    Mostly Cloudy

  • Saturday

    Saturday: A chance of rain between 8am and 2pm. Mostly cloudy, with a high near 8.

    High: 8 °C

    Chance Rain

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 15. South wind around 16 km/h, with gusts as high as 29 km/h.
Tonight
Mostly cloudy, with a low around 9. South wind 11 to 14 km/h.
Wednesday
Cloudy, then gradually becoming mostly sunny, with a high near 18. South wind 16 to 21 km/h increasing to 22 to 27 km/h in the afternoon. Winds could gust as high as 42 km/h.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 4. South wind 24 to 26 km/h, with gusts as high as 45 km/h. Chance of precipitation is 70%. New precipitation amounts of less than 1 mm possible.
Thursday
Rain likely before 2pm, then a chance of rain and snow. Mostly cloudy, with a high near 9. South southwest wind 24 to 27 km/h becoming west northwest in the afternoon. Winds could gust as high as 45 km/h. Chance of precipitation is 60%. Little or no snow accumulation expected.
Thursday Night
A chance of snow before 8pm. Mostly clear, with a low around -2. Chance of precipitation is 30%.
Friday
Sunny, with a high near 11.
Friday Night
Mostly cloudy, with a low around 3.
Saturday
A chance of rain between 8am and 2pm. Mostly cloudy, with a high near 8.
Saturday Night
Partly cloudy, with a low around -3.
Sunday
Mostly sunny, with a high near 7.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 0.
Monday
Rain and snow likely. Mostly cloudy, with a high near 8.
Click Map For Forecast
Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Casco MI
 42.77°N 82.66°W (Elev. 636 m)
Last Update:
9:13 am EDT Mar 18, 2025
Forecast Valid:
12pm EDT Mar 18, 2025-6pm EDT Mar 24, 2025
 
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