TODAY NOV18
TEMPERATURE5
HUMIDITY100
PRESSURE30.32
WIND COND.260 3.4
  • 2821Sun
  • 3216Mon
  • 3024Tue
  • 3825Wed
  • 4132
daynightWeather update from Decorah at

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Decorah 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°F27°F19°F0.5"
February14°F29°F21°F0.4"
March29°F45°F36°F1.5"
April40°F59°F48°F3.4"
May50°F70°F60°F2.9"
June61°F79°F69°F4.3"
July65°F82°F73°F3.9"
August62°F79°F70°F4.0"
September54°F73°F63°F3.4"
October43°F61°F51°F3.0"
November31°F47°F38°F1.0"
December18°F31°F24°F0.9"

Did you know?

  • The highest monthly average temperature in Decorah for July is 73 degrees.
  • The lowest monthly average temperature in Decorah for January is 19 degrees.
  • The most monthly precipitation in Decorah occurs in June with 4.3 inches.
  • The air quality index in Decorah is 19% better than the national average.
  • The pollution index in Decorah is 89% better than the national average.

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Compare Decorah, IA Weather To Other Cities

Decorah 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.
IndexDecorahIowaNational
Air quality index403950
Pollution index530,4841,643,8365,066,862

Decorah air quality information

MeasurementTotal
Days measured361
Days with good air quality264
Days with moderate air quality97
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Decorah air quality information

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

Average monthly Decorah temperature with heat index

Decorah monthly precipitation with daily maximum

Decorah monthly snow depth with daily maximum

Decorah monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Burr Oak, IA2424020%
Castalia, IA1884020%
Ridgeway, IA2854020%
Jackson Junction, IA474314%
Calmar, IA1,0234314%
Decorah, IA7,9854020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Pismo Beach, CA7,9845612%
Summit Park, UT7,986476%
Ilion, NY7,9863432%
Newton, NJ7,9823922%
Oak Brook, IL7,9886020%
Decorah, IA7,9854020%
Source: The Decorah, 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.