TODAY MAY15
TEMPERATURE46
HUMIDITY59
PRESSURE30.24
WIND COND.
  • 7049Sat30%
  • 7151Sun30%
  • 7453Mon30%30%
  • 7756Tue
  • 7659Wed
daynightWeather update from South Haven, South Haven Area Regional Airport at

Key findings

  • The highest monthly average temperature in Decatur for July is 71.6 degrees
  • The lowest monthly average temperature in Decatur for January is 27 degrees
  • The most monthly precipitation in Decatur occurs in October with 5.5 inches
  • The air quality index in Decatur is 24% better than the national average
  • The pollution index in Decatur is 65% better than the national average

Compare Decatur, MI Weather

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      Decatur 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
      January20°F34°F27°F2.6"
      February20°F35°F27°F1.8"
      March28°F47°F37°F2.5"
      April37°F60°F48°F4.0"
      May47°F70°F58°F3.5"
      June56°F79°F68°F3.3"
      July61°F82°F72°F3.6"
      August60°F81°F70°F4.8"
      September53°F75°F63°F3.4"
      October43°F63°F53°F5.5"
      November33°F51°F42°F2.7"
      December25°F39°F32°F2.5"

      Decatur 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.
      IndexDecaturMichiganNational
      Air quality index386950
      Pollution index1,797,1304,018,8005,066,862

      Decatur air quality information

      MeasurementTotal
      Days measured362
      Days with good air quality312
      Days with moderate air quality50
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Decatur air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.020%
      Carbon Tetrachloride0.002%
      Lead0.002%
      Mercury0.000%

      Average monthly Decatur temperature with heat index

      Decatur monthly precipitation with daily maximum

      Decatur monthly snow depth with daily maximum

      Decatur monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Vandalia, MI4293726%
      Paw Paw, MI3,4083824%
      Marcellus, MI1,0393824%
      Lawrence, MI9823824%
      Lawton, MI1,6403824%
      Decatur, MI2,0333824%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      East Berwick, PA2,0333824%
      Neodesha, KS2,0343824%
      St. Matthews, SC2,0344314%
      Durant, IA2,0323236%
      Country Knolls, NY2,0343726%
      Decatur, MI2,0333824%
      Source: The Decatur, 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.