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

48°F

9°C

Humidity 66%
Wind Speed NW 8 mph
Barometer 29.94 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 14 May 6:55 am EDT
Extended Forecast for

Casco MI

  • Today

    Today: Partly sunny, with a high near 62. North wind 13 to 15 mph, with gusts as high as 23 mph.

    High: 62 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 40. North northeast wind 5 to 8 mph becoming calm in the evening.

    Low: 40 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 68. Light southwest wind becoming south southwest 5 to 10 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 68 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 52. South wind 7 to 9 mph.

    Low: 52 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 80. South wind 8 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.

    High: 80 °F

    Partly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, then showers likely after 8pm. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.

    Low: 56 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers before 8am. Mostly sunny, with a high near 77. Chance of precipitation is 30%.

    High: 77 °F

    Chance
    Showers then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 56.

    Low: 56 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 62. North wind 13 to 15 mph, with gusts as high as 23 mph.
Tonight
Mostly clear, with a low around 40. North northeast wind 5 to 8 mph becoming calm in the evening.
Friday
Partly sunny, with a high near 68. Light southwest wind becoming south southwest 5 to 10 mph in the afternoon. Winds could gust as high as 18 mph.
Friday Night
Partly cloudy, with a low around 52. South wind 7 to 9 mph.
Saturday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 80. South wind 8 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms, then showers likely after 8pm. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.
Sunday
A chance of showers before 8am. Mostly sunny, with a high near 77. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 56.
Monday
Mostly sunny, with a high near 87.
Monday Night
A chance of showers. Partly cloudy, with a low around 65.
Tuesday
A chance of showers. Partly sunny, with a high near 87.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 58.
Wednesday
A chance of showers. Partly sunny, with a high near 76.
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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:
4:25 am EDT May 14, 2026
Forecast Valid:
7am EDT May 14, 2026-6pm EDT May 20, 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