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.

Fog

46°F

8°C

Humidity 93%
Wind Speed Calm
Barometer 29.95 in
Dewpoint 45°F (7°C)
Visibility 0.50 mi
Last update 17 Apr 4:16 am EDT
Extended Forecast for

Port Huron MI

Dense Fog Advisory until April 17, 10:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until April 17, 10:00am

    NOW until 10:00am Fri

    Dense Fog Advisory

  • Overnight

    Low: 44 °F

    Dense Fog

  • Friday

    Friday: Widespread dense fog, mainly before 8am. Otherwise, partly sunny, with a high near 66. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 66 °F

    Dense Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm, mainly after 5am. Increasing clouds, with a low around 51. South southeast wind 7 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 51 °F

    Partly Cloudy
    then Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 66. South wind around 14 mph becoming west in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 66 °F

    Showers

  • Saturday Night

    Saturday Night: A chance of showers before 2am. Mostly cloudy, with a low around 35. West northwest wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 35 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of rain and snow showers after 2pm. Partly sunny, with a high near 45. Chance of precipitation is 30%.

    High: 45 °F

    Mostly Sunny
    then Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: A chance of snow showers before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 28. Chance of precipitation is 30%.

    Low: 28 °F

    Chance Snow
    Showers then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

Detailed Forecast

Overnight
Widespread dense fog, mainly after 5am. Otherwise, mostly cloudy, with a low around 44. Calm wind.
Friday
Widespread dense fog, mainly before 8am. Otherwise, partly sunny, with a high near 66. Calm wind becoming south southeast around 5 mph in the afternoon.
Friday Night
Showers likely and possibly a thunderstorm, mainly after 5am. Increasing clouds, with a low around 51. South southeast wind 7 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers and possibly a thunderstorm. High near 66. South wind around 14 mph becoming west in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
A chance of showers before 2am. Mostly cloudy, with a low around 35. West northwest wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Sunday
A chance of rain and snow showers after 2pm. Partly sunny, with a high near 45. Chance of precipitation is 30%.
Sunday Night
A chance of snow showers before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 28. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 43.
Monday Night
Partly cloudy, with a low around 33.
Tuesday
Mostly sunny, with a high near 63.
Tuesday Night
Partly cloudy, with a low around 42.
Wednesday
Mostly sunny, with a high near 61.
Wednesday Night
Mostly clear, with a low around 42.
Thursday
Sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Port Huron MI
 42.97°N 82.43°W (Elev. 600 ft)
Last Update:
4:24 am EDT Apr 17, 2026
Forecast Valid:
4am EDT Apr 17, 2026-6pm EDT Apr 23, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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