TODAY FEB27
TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.
  • 3120Sun40%
  • 2816Mon
  • 4527Tue
  • 4728Wed
  • 4926Thu
daynightWeather update from Storm Lake at

Key findings

  • The highest monthly average temperature in Marathon for July is 74 degrees
  • The lowest monthly average temperature in Marathon for January is 20 degrees
  • The most monthly precipitation in Marathon occurs in May with 5.8 inches
  • The air quality index in Marathon is 30% better than the national average
  • The pollution index in Marathon is 85% better than the national average

Compare Marathon, IA Weather

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      Marathon 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"

      Marathon 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.
      IndexMarathonIowaNational
      Air quality index353950
      Pollution index769,6971,643,8365,066,862

      Marathon 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

      Marathon air quality information

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

      Average monthly Marathon temperature with heat index

      Marathon monthly precipitation with daily maximum

      Marathon monthly snow depth with daily maximum

      Marathon monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Ayrshire, IA1361570%
      Curlew, IA731570%
      Albert City, IA5893530%
      Linn Grove, IA1403530%
      Varina, IA963530%
      Marathon, IA2703530%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      New Richmond, WV270295490%
      Leach, OK2703628%
      Pillow, PA2704412%
      Pecktonville, MD2704020%
      Campo Verde, TX2704216%
      Marathon, IA2703530%
      Source: The Marathon, 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.