TODAY NOV22
TEMPERATURE37
HUMIDITY93
PRESSURE101730
WIND COND.330 25.9
  • 3826Fri
  • 4031Sat
  • 4627Sun
  • 3217Mon20%
  • 2918Tue
daynightWeather update from Decorah at
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Weather Quick Facts

  • 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 7% better than the national average
  • The pollution index in Ossian is 81% 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 index393942
      Pollution index530,4841,154,5352,726,193

      Ossian air quality

      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

      Air quality details

      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

      CityPopulationAir Quality IndexNational Avg.
      Postville, IA2,5283530.0%
      Ridgeway, IA2583530.0%
      Waukon, IA3,6633530.0%
      Castalia, IA1693530.0%
      Decorah, IA7,6153530.0%
      Ossian, IA7983922.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Teec Nos Pos, AZ798492.0%
      Millersburg, KY7984216.0%
      Dulac, LA7984118.0%
      Burr Oak, MI7983824.0%
      Bella Villa, MO798548.0%
      Ossian, IA7983922.0%
      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.