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.

Partly Cloudy

70°F

21°C

Humidity 78%
Wind Speed NW 6 mph
Barometer 29.91 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 19 Aug 9:35 am EDT
Extended Forecast for

2 Miles S Fort Gratiot MI

  • Today

    Today: Mostly sunny, with a high near 75. Northwest wind around 8 mph becoming north northeast in the afternoon.

    High: 75 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 58. Northeast wind around 5 mph becoming calm in the evening.

    Low: 58 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 76. Calm wind becoming north northeast around 6 mph in the afternoon.

    High: 76 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 58. Northeast wind around 5 mph becoming light and variable after midnight.

    Low: 58 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 80. South wind 3 to 8 mph.

    High: 80 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 61.

    Low: 61 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 79. Chance of precipitation is 80%.

    High: 79 °F

    Chance
    Showers then
    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 8pm. Mostly cloudy, with a low around 58.

    Low: 58 °F

    Showers then
    Partly Cloudy

  • Sunday

    Sunday: A chance of showers after 2pm. Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

Today
Mostly sunny, with a high near 75. Northwest wind around 8 mph becoming north northeast in the afternoon.
Tonight
Partly cloudy, with a low around 58. Northeast wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 76. Calm wind becoming north northeast around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 58. Northeast wind around 5 mph becoming light and variable after midnight.
Friday
Mostly sunny, with a high near 80. South wind 3 to 8 mph.
Friday Night
Mostly cloudy, with a low around 61.
Saturday
A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 79. Chance of precipitation is 80%.
Saturday Night
Showers and possibly a thunderstorm before 8pm. Mostly cloudy, with a low around 58.
Sunday
A chance of showers after 2pm. Mostly sunny, with a high near 74.
Sunday Night
A chance of showers before 8pm. Partly cloudy, with a low around 56.
Monday
Sunny, with a high near 75.
Monday Night
Partly cloudy, with a low around 57.
Tuesday
Mostly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Fort Gratiot MI
 43.04°N 82.48°W (Elev. 620 ft)
Last Update:
4:24 am EDT Aug 19, 2026
Forecast Valid:
9am EDT Aug 19, 2026-6pm EDT Aug 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