TODAY APR14
TEMPERATURE51
HUMIDITY68
PRESSURE100540
WIND COND.230 22.3
  • 6843Mon
  • 6450Tue50%
  • 7050Wed90%
  • 6243Thu
  • 5537Fri
daynightWeather update from Detroit, Willow Run Airport at
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Weather Quick Facts

  • The highest monthly average temperature in South Lyon for July is 74.4 degrees
  • The lowest monthly average temperature in South Lyon for January is 26.2 degrees
  • The most monthly precipitation in South Lyon occurs in May with 4 inches
  • The air quality index in South Lyon is 5% better than the national average
  • The pollution index in South Lyon is 93% better than the national average

Compare South Lyon, MI Weather

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      South Lyon Average Temperature

      In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
      MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
      January18°F34°F26°F2.0"
      February18°F36°F26°F1.7"
      March28°F48°F37°F2.5"
      April38°F63°F50°F3.2"
      May48°F74°F61°F4.0"
      June58°F83°F71°F3.6"
      July62°F87°F74°F3.6"
      August61°F85°F73°F3.4"
      September54°F78°F65°F3.0"
      October43°F65°F53°F2.5"
      November32°F52°F42°F2.6"
      December24°F39°F31°F2.1"

      South Lyon air quality index & pollution index

      In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
      IndexSouth LyonMichiganNational
      Air quality index406942
      Pollution index180,6674,161,6062,726,193

      South Lyon air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality292
      Days with moderate air quality73
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      South Lyon air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.002%
      Carbon Tetrachloride0.001%
      Lead0.000%
      Mercury0.000%

      Average monthly South Lyon temperature with heat index

      South Lyon monthly precipitation with daily maximum

      South Lyon monthly snow depth with daily maximum

      South Lyon monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Dexter, MI4,6914020.0%
      Whitmore Lake, MI8,0104020.0%
      Howell, MI9,6104020.0%
      Northville, MI5,9684020.0%
      Brighton, MI7,6494020.0%
      South Lyon, MI11,8184020.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Manchester, VA11,8144412.0%
      Dunkirk, NY11,8123726.0%
      Jerome, ID11,8242060.0%
      Bucyrus, OH11,8084118.0%
      Martinsville, IN11,8074216.0%
      South Lyon, MI11,8184020.0%
      Source: The South Lyon, MI weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.