TODAY MAY28
TEMPERATURE70
HUMIDITY94
PRESSURE29.91
WIND COND.20 8.1
  • 7750Thu
  • 7251Fri
  • 6652Sat40%30%
  • 7259Sun30%
  • 8166Mon
daynightWeather update from Denison at
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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"

Did you know?

  • The highest monthly average temperature in Denison for July is 74 degrees.
  • The lowest monthly average temperature in Denison for January is 20 degrees.
  • The most monthly precipitation in Denison occurs in May with 5.8 inches.
  • The air quality index in Denison is 18% better than the national average.
  • The pollution index in Denison is 90% better than the national average.

Compare Denison, IA Weather To Other Cities

      vs

      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 index413950
      Pollution index517,6911,643,8365,066,862

      Denison air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality254
      Days with moderate air quality110
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality

      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, IA3724118%
      Vail, IA4784118%
      Westside, IA3294118%
      Charter Oak, IA5964118%
      Ricketts, IA1244118%
      Denison, IA8,3264118%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Gulf Hills, MS8,3263824%
      Jefferson City, TN8,3243922%
      Roxboro, NC8,3293530%
      Helotes, TX8,3294510%
      Edgemere, MD8,322468%
      Denison, IA8,3264118%
      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.