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

Hazardous Weather Conditions

Current conditions at

Pontiac, Oakland County International Airport (KPTK)

Lat: 42.66°NLon: 83.41°WElev: 981ft.

Overcast

68°F

20°C

Humidity 73%
Wind Speed NE 8 mph
Barometer 30.32 in (1026.5 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 16 Sep 5:53 pm EDT
Extended Forecast for

South Lyon MI

  • Tonight

    Tonight: Showers likely, with thunderstorms also possible after 2am. Cloudy, with a low around 60. East northeast wind 3 to 7 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 60 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers and thunderstorms. Cloudy, with a high near 75. North northeast wind 3 to 5 mph. Chance of precipitation is 30%.

    High: 75 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 54. North northeast wind 3 to 5 mph.

    Low: 54 °F

    Decreasing
    Clouds

  • Friday

    Friday: Increasing clouds, with a high near 74. Northeast wind 6 to 8 mph.

    High: 74 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 55. East northeast wind 6 to 8 mph.

    Low: 55 °F

    Mostly Cloudy

  • Saturday

    Saturday: Showers, with thunderstorms also possible after 2pm. High near 69. Chance of precipitation is 90%.

    High: 69 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 57. Chance of precipitation is 90%.

    Low: 57 °F

    Showers

  • Sunday

    Sunday: Showers likely, mainly before 8am. Mostly cloudy, with a high near 68.

    High: 68 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers after 2am. Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Showers likely, with thunderstorms also possible after 2am. Cloudy, with a low around 60. East northeast wind 3 to 7 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A chance of showers and thunderstorms. Cloudy, with a high near 75. North northeast wind 3 to 5 mph. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 54. North northeast wind 3 to 5 mph.
Friday
Increasing clouds, with a high near 74. Northeast wind 6 to 8 mph.
Friday Night
Mostly cloudy, with a low around 55. East northeast wind 6 to 8 mph.
Saturday
Showers, with thunderstorms also possible after 2pm. High near 69. Chance of precipitation is 90%.
Saturday Night
Showers and possibly a thunderstorm. Low around 57. Chance of precipitation is 90%.
Sunday
Showers likely, mainly before 8am. Mostly cloudy, with a high near 68.
Sunday Night
A chance of showers after 2am. Mostly cloudy, with a low around 52.
Monday
A chance of showers. Mostly cloudy, with a high near 64.
Monday Night
A chance of showers. Mostly cloudy, with a low around 52.
Tuesday
A chance of showers. Mostly cloudy, with a high near 67.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 55.
Wednesday
Partly sunny, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Lyon MI
 42.48°N 83.64°W (Elev. 938 ft)
Last Update:
4:24 pm EDT Sep 16, 2026
Forecast Valid:
6pm EDT Sep 16, 2026-6pm EDT Sep 23, 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