National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St Clair County International Airport (KPHN)

Lat: 42.91°NLon: 82.53°WElev: 636ft.

Fair

91°F

33°C

Humidity 59%
Wind Speed S 10 G 16 mph
Barometer 30.02 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 22 Jun 5:35 pm EDT
Extended Forecast for

Fort Gratiot MI

Heat Advisory June 22, 05:55pm until June 24, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory June 22, 05:55pm until June 24, 08:00pm

    NOW until 8:00pm Tue

    Heat Advisory

  • Tonight

    Low: 74 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 94. Heat index values as high as 100. Southwest wind 9 to 14 mph, with gusts as high as 21 mph.

    High: 94 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 73. Southwest wind around 8 mph.

    Low: 73 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 84. West wind 7 to 10 mph becoming north in the afternoon. Chance of precipitation is 50%.

    High: 84 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers after 2am. Mostly cloudy, with a low around 61. North northeast wind 6 to 8 mph. Chance of precipitation is 30%.

    Low: 61 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 76. Chance of precipitation is 50%.

    High: 76 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 50%.

    Low: 64 °F

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 81.

    High: 81 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 74. Southwest wind 6 to 8 mph.
Monday
Sunny and hot, with a high near 94. Heat index values as high as 100. Southwest wind 9 to 14 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 73. Southwest wind around 8 mph.
Tuesday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 84. West wind 7 to 10 mph becoming north in the afternoon. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers after 2am. Mostly cloudy, with a low around 61. North northeast wind 6 to 8 mph. Chance of precipitation is 30%.
Wednesday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 76. Chance of precipitation is 50%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 50%.
Thursday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 81.
Thursday Night
Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 66.
Friday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 81.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Saturday
Partly sunny, with a high near 78.
Saturday Night
Partly cloudy, with a low around 63.
Sunday
A chance of showers. Mostly sunny, with a high near 81.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fort Gratiot MI
 43.08°N 82.5°W (Elev. 623 ft)
Last Update:
4:24 pm EDT Jun 22, 2025
Forecast Valid:
5pm EDT Jun 22, 2025-6pm EDT Jun 29, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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