Current conditions at

St Clair County International Airport (KPHN)

Lat: 42.91°NLon: 82.53°WElev: 636ft.

Partly Cloudy

64°F

18°C

Humidity 100%
Wind Speed Calm
Barometer 30.00 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 21 Jun 5:16 am EDT
Extended Forecast for

3 Miles N Fort Gratiot MI

Extreme Heat Watch June 22, 08:00am until June 24, 08:00pm
Heat Advisory June 21, 02:00pm until June 22, 08:00am
Click here for hazard details and duration
Extreme Heat Watch
Heat Advisory
  • Overnight

    Overnight: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 65. South wind around 7 mph.  Chance of precipitation is 40%.

    Low: 65 °F

    Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms before 8am, then showers likely and possibly a thunderstorm between 8am and 11am.  Partly sunny, with a high near 86. South wind 8 to 16 mph, with gusts as high as 26 mph.  Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    High: 86 °F

    Showers
    Likely then
    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. Southwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 76 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 92. Heat index values as high as 100. Southwest wind around 14 mph, with gusts as high as 22 mph.

    High: 92 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 74. Southwest wind around 10 mph.

    Low: 74 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 71.

    Low: 71 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 63.

    Low: 63 °F

    Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Overnight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. South wind around 7 mph. Chance of precipitation is 40%.
Saturday
A chance of showers and thunderstorms before 8am, then showers likely and possibly a thunderstorm between 8am and 11am. Partly sunny, with a high near 86. South wind 8 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
Mostly clear, with a low around 76. Southwest wind around 15 mph, with gusts as high as 25 mph.
Sunday
Sunny, with a high near 92. Heat index values as high as 100. Southwest wind around 14 mph, with gusts as high as 22 mph.
Sunday Night
Mostly clear, with a low around 74. Southwest wind around 10 mph.
Monday
Sunny, with a high near 92.
Monday Night
Mostly clear, with a low around 71.
Tuesday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 82.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Wednesday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 77.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Thursday
Showers and thunderstorms likely. Partly sunny, with a high near 80.
Thursday Night
Showers likely. Mostly cloudy, with a low around 66.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 78.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Fort Gratiot MI
 43.12°N 82.5°W (Elev. 600 ft)
4:24 am EDT Jun 21, 2025
5am EDT Jun 21, 2025-6pm EDT Jun 27, 2025
 
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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