TODAY MAY10
TEMPERATURE48
HUMIDITY76
PRESSURE30.12
WIND COND.340 11.2
  • 6137Mon
  • 6140Tue
  • 6343Wed
  • 6548Thu20%
  • 6850Fri50%40%
daynightWeather update from Denison at

Key findings

  • The highest monthly average temperature in Denison for July is 74 degrees
  • The lowest monthly average temperature in Denison for January is 20.5 degrees
  • The most monthly precipitation in Denison occurs in May with 5.8 inches
  • The air quality index in Denison is 30% better than the national average
  • The pollution index in Denison is 90% better than the national average

Compare Denison, IA Weather

      vs
      How would you rate the weather in Denison?
      Write a review to give others more information about this area.
      How would you rate the air quality in Denison?
      Write a review to give others more information about this area.
      See all Denison poll results

      Denison 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
      January13°F29°F20°F0.2"
      February14°F31°F22°F2.0"
      March29°F47°F36°F0.7"
      April39°F61°F49°F3.9"
      May50°F73°F61°F5.8"
      June61°F82°F71°F2.9"
      July64°F85°F74°F2.8"
      August62°F81°F70°F2.6"
      September54°F76°F64°F2.7"
      October42°F62°F51°F1.9"
      November29°F49°F37°F0.9"
      December17°F32°F24°F3.5"

      Denison 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.
      IndexDenisonIowaNational
      Air quality index353950
      Pollution index517,6911,643,8365,066,862

      Denison air quality information

      MeasurementTotal
      Days measured364
      Days with good air quality322
      Days with moderate air quality42
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Denison air quality information

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

      Average monthly Denison temperature with heat index

      Denison monthly precipitation with daily maximum

      Denison monthly snow depth with daily maximum

      Denison monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Deloit, IA3723530%
      Vail, IA4783530%
      Kiron, IA2623530%
      Westside, IA3293530%
      Charter Oak, IA5963530%
      Denison, IA8,3263530%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Gulf Hills, MS8,3264216%
      Jefferson City, TN8,3244412%
      Roxboro, NC8,3294412%
      Helotes, TX8,329492%
      Edgemere, MD8,322468%
      Denison, IA8,3263530%
      Source: The Denison, 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.