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

52°F

11°C

Humidity 88%
Wind Speed Calm
Barometer 29.80 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 19 Jun 6:15 am EDT
Extended Forecast for

Casco MI

  • Juneteenth

    Juneteenth: Scattered sprinkles after 2pm. Sunny, with a high near 74. West northwest wind 6 to 15 mph, with gusts as high as 23 mph.

    High: 74 °F

    Scattered
    Sprinkles

  • Tonight

    Tonight: Partly cloudy, with a low around 52. West northwest wind 3 to 8 mph.

    Low: 52 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of showers and thunderstorms between 3pm and 5pm, then a chance of showers after 5pm. Mostly sunny, with a high near 75. West wind 3 to 7 mph. Chance of precipitation is 30%.

    High: 75 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: Showers likely, mainly between 7pm and 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 53. West northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 53 °F

    Showers
    Likely then
    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 75. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 75 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Showers likely. Mostly cloudy, with a low around 54. Chance of precipitation is 70%.

    Low: 54 °F

    Showers
    Likely

  • Monday

    Monday: A chance of showers before 2pm. Partly sunny, with a high near 72. Chance of precipitation is 40%.

    High: 72 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

Detailed Forecast

Juneteenth
Scattered sprinkles after 2pm. Sunny, with a high near 74. West northwest wind 6 to 15 mph, with gusts as high as 23 mph.
Tonight
Partly cloudy, with a low around 52. West northwest wind 3 to 8 mph.
Saturday
A chance of showers and thunderstorms between 3pm and 5pm, then a chance of showers after 5pm. Mostly sunny, with a high near 75. West wind 3 to 7 mph. Chance of precipitation is 30%.
Saturday Night
Showers likely, mainly between 7pm and 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 53. West northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Increasing clouds, with a high near 75. Calm wind becoming southwest around 5 mph in the afternoon.
Sunday Night
Showers likely. Mostly cloudy, with a low around 54. Chance of precipitation is 70%.
Monday
A chance of showers before 2pm. Partly sunny, with a high near 72. Chance of precipitation is 40%.
Monday Night
Partly cloudy, with a low around 52.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
Partly cloudy, with a low around 54.
Wednesday
A chance of showers. Mostly sunny, with a high near 75.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 55.
Thursday
A chance of showers. Mostly sunny, with a high near 76.
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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 am EDT Jun 19, 2026
Forecast Valid:
6am EDT Jun 19, 2026-6pm EDT Jun 25, 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