TODAY AUG21
TEMPERATURE74
HUMIDITY69
PRESSURE29.84
WIND COND.110 10.3
  • 7757Tue80%40%
  • 7555Wed
  • 7957Thu
  • 7863Fri
  • 8268Sat
daynightWeather update from South Haven, South Haven Area Regional Airport at

Decatur Average Weather

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"

Did you know?

  • The highest monthly average temperature in Decatur for July is 72 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 21% better than the national average.
  • The pollution index in Decatur is 64% better than the national average.

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Compare Decatur, MI Weather To Other Cities

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 index396950
Pollution index1,797,1304,018,8005,066,862

Decatur air quality information

MeasurementTotal
Days measured242
Days with good air quality198
Days with moderate air quality44
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

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.
Dowagiac, MI5,8633824%
Watervliet, MI1,8343824%
Hartford, MI2,6243824%
Cassopolis, MI1,7263824%
Marcellus, MI1,0393922%
Decatur, MI2,0333922%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
East Berwick, PA2,0334020%
Country Knolls, NY2,0343628%
Durant, IA2,0325612%
Hampton Manor, NY2,0343628%
Neodesha, KS2,0343726%
Decatur, MI2,0333922%
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.