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

54°F

12°C

Humidity 51%
Wind Speed NW 9 mph
Barometer 29.97 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 14 May 9:35 am EDT
Extended Forecast for

3 Miles N Fort Gratiot MI

  • Today

    Today: Mostly sunny, with a high near 55. North wind 15 to 17 mph, with gusts as high as 24 mph.

    High: 55 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 40. North wind 5 to 8 mph becoming calm after midnight.

    Low: 40 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 67. Light south southwest wind increasing to 5 to 10 mph in the morning.

    High: 67 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 50. South wind around 10 mph.

    Low: 50 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of showers and thunderstorms between 2pm and 5pm, then a chance of showers after 5pm. Partly sunny, with a high near 78. South wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    High: 78 °F

    Partly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers before 2am. Mostly cloudy, with a low around 52. Chance of precipitation is 50%.

    Low: 52 °F

    Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers after 2am. Mostly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy
    then Chance
    Showers

  • Monday

    Monday: A chance of showers before 8am. Mostly sunny, with a high near 85.

    High: 85 °F

    Chance
    Showers then
    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 55. North wind 15 to 17 mph, with gusts as high as 24 mph.
Tonight
Mostly clear, with a low around 40. North wind 5 to 8 mph becoming calm after midnight.
Friday
Partly sunny, with a high near 67. Light south southwest wind increasing to 5 to 10 mph in the morning.
Friday Night
Partly cloudy, with a low around 50. South wind around 10 mph.
Saturday
A chance of showers and thunderstorms between 2pm and 5pm, then a chance of showers after 5pm. Partly sunny, with a high near 78. South wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Saturday Night
A chance of showers before 2am. Mostly cloudy, with a low around 52. Chance of precipitation is 50%.
Sunday
Mostly sunny, with a high near 68.
Sunday Night
A chance of showers after 2am. Mostly cloudy, with a low around 51.
Monday
A chance of showers before 8am. Mostly sunny, with a high near 85.
Monday Night
A chance of showers. Partly cloudy, with a low around 62.
Tuesday
A chance of showers. Partly sunny, with a high near 84.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 55.
Wednesday
A chance of showers. Partly sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Fort Gratiot MI
 43.12°N 82.5°W (Elev. 600 ft)
Last Update:
9:36 am EDT May 14, 2026
Forecast Valid:
9am EDT May 14, 2026-6pm EDT May 20, 2026
 
Forecast Discussion
 
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Additional Resources

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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