TODAY MAY05
TEMPERATURE57
HUMIDITY38
PRESSURE30.1
WIND COND. 9.4
  • 5838Thu30%
  • 5633Fri
  • 5738Sat20%
  • 5735Sun
  • 5838Mon
daynightWeather update from Decorah at

Key findings

  • The highest monthly average temperature in Ossian for July is 73 degrees
  • The lowest monthly average temperature in Ossian for January is 19.3 degrees
  • The most monthly precipitation in Ossian occurs in June with 4.3 inches
  • The air quality index in Ossian is 22% better than the national average
  • The pollution index in Ossian is 90% better than the national average

Compare Ossian, IA Weather

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      Ossian 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"

      Ossian 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.
      IndexOssianIowaNational
      Air quality index393950
      Pollution index530,4841,643,8365,066,862

      Ossian air quality information

      MeasurementTotal
      Days measured363
      Days with good air quality286
      Days with moderate air quality77
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Ossian air quality information

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

      Average monthly Ossian temperature with heat index

      Ossian monthly precipitation with daily maximum

      Ossian monthly snow depth with daily maximum

      Ossian monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Waukon, IA3,7863530%
      Castalia, IA1883530%
      Decorah, IA7,9853530%
      Postville, IA2,2813530%
      Ridgeway, IA2853530%
      Ossian, IA9623922%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Jasper, MO9623726%
      Parkin, AR9624510%
      Haxtun, CO9621962%
      Fort Loudon, PA9623628%
      Walker, MN9622942%
      Ossian, IA9623922%
      Source: The Ossian, 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.