TODAY FEB28
TEMPERATURE77
HUMIDITY54
PRESSURE30.01
WIND COND.190 20.5
  • 6242Mon80%20%
  • 5040Tue50%90%
  • 5841Wed90%
  • 6444Thu
  • 6044Fri
daynightWeather update from Atlanta, De Kalb-Peachtree Airport at

Key findings

  • The highest monthly average temperature in Decatur for August is 80 degrees
  • The lowest monthly average temperature in Decatur for December is 45 degrees
  • The most monthly precipitation in Decatur occurs in July with 12.9 inches
  • The air quality index in Decatur is 5% worse than the national average
  • The pollution index in Decatur is 294% worse than the national average

Compare Decatur, GA 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
      January36°F57°F45°F4.9"
      February35°F58°F46°F8.7"
      March43°F68°F55°F9.3"
      April47°F72°F59°F8.7"
      May56°F81°F68°F6.6"
      June66°F88°F76°F6.3"
      July69°F88°F77°F12.9"
      August71°F93°F80°F9.3"
      September65°F87°F75°F4.1"
      October54°F76°F64°F6.4"
      November41°F66°F52°F4.0"
      December36°F56°F45°F8.1"

      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.
      IndexDecaturGeorgiaNational
      Air quality index524150
      Pollution index19,982,2003,237,5535,066,862

      Decatur air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality162
      Days with moderate air quality184
      Days w/ poor A.Q. for sensitive groups18
      Days with unhealthy air quality1

      Decatur air quality information

      PollutantTotal
      Arsenic0.210%
      Benzene0.260%
      Carbon Tetrachloride0.050%
      Lead0.100%
      Mercury0.010%

      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.
      Hapeville, GA6,658524%
      Avondale Estates, GA3,095524%
      Doraville, GA10,348524%
      Forest Park, GA19,156524%
      North Decatur, GA16,652524%
      Decatur, GA21,210524%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Clinton, UT21,2104510%
      Patterson, CA21,205492%
      Oxford, AL21,2023824%
      South Milwaukee, WI21,1974412%
      Arnold, MO21,196548%
      Decatur, GA21,210524%
      Source: The Decatur, GA 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.