TODAY NOV16
TEMPERATURE30
HUMIDITY100
PRESSURE29.97
WIND COND.300 17.2
  • 3720Fri90%
  • 2510Sat
  • 3017Sun
  • 3317Mon
  • 3222Tue
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 63% better than the national average.
  • The pollution index in Duncan is 84% better than the national average.

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Compare Duncan, IA Weather To Other Cities

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.
Nellie, OH963628%
Pioneer, LA965612%
Ventana, AZ967448%
Crows Nest, IN965918%
Canova, SD964020%
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.