TODAY JUN06
TEMPERATURE68
HUMIDITY
PRESSURE30.06
WIND COND.70 3.4
  • 8364Sat20%
  • 9072Sun20%
  • 9469Mon30%
  • 8459Tue50%70%
  • 7655Wed30%
daynightWeather update from Forest City Municipal Airport at
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Duncan 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
January9°F25°F17°F0.7"
February11°F29°F20°F1.1"
March25°F44°F34°F2.2"
April36°F60°F47°F5.1"
May48°F71°F59°F5.0"
June58°F81°F69°F5.4"
July61°F84°F72°F4.2"
August59°F82°F70°F4.0"
September51°F76°F62°F4.3"
October38°F62°F49°F2.7"
November26°F47°F36°F1.5"
December13°F29°F21°F1.4"

Did you know?

  • The highest monthly average temperature in Duncan for July is 72 degrees.
  • The lowest monthly average temperature in Duncan for January is 17 degrees.
  • The most monthly precipitation in Duncan occurs in June with 5.4 inches.
  • The air quality index in Duncan is 64% better than the national average.
  • The pollution index in Duncan is 85% better than the national average.

Compare Duncan, IA Weather To Other Cities

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      Duncan 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.
      IndexDuncanIowaNational
      Air quality index183950
      Pollution index784,9241,643,8365,066,862

      Duncan air quality information

      MeasurementTotal
      Days measured334
      Days with good air quality332
      Days with moderate air quality2
      Days w/ poor A.Q. for sensitive groups
      Days with unhealthy air quality

      Duncan air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.010%
      Carbon Tetrachloride0.001%
      Lead0.002%
      Mercury0.000%

      Average monthly Duncan temperature with heat index

      Duncan monthly precipitation with daily maximum

      Duncan monthly snow depth with daily maximum

      Duncan monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Britt, IA1,9191864%
      Forest City, IA4,0431864%
      Hutchins, IA131864%
      Miller, IA01864%
      Corwith, IA2301864%
      Duncan, IA961864%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Millard, MO963432%
      Belden, NE964118%
      Millerton, IA964118%
      Nellie, OH963628%
      Pioneer, LA965612%
      Duncan, IA961864%
      Source: The Duncan, IA 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.