TODAY FEB28
TEMPERATURE38
HUMIDITY81
PRESSURE29.8
WIND COND.280 35.3
  • 3614Mon
  • 4629Tue
  • 4927Wed
  • 5028Thu
  • 4824Fri
daynightWeather update from Grinnell Municipal Airfield at

Key findings

  • The highest monthly average temperature in Chelsea for July is 74 degrees
  • The lowest monthly average temperature in Chelsea for January is 21 degrees
  • The most monthly precipitation in Chelsea occurs in June with 7.8 inches
  • The air quality index in Chelsea is 22% better than the national average
  • The pollution index in Chelsea is 92% better than the national average

Compare Chelsea, IA Weather

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      Chelsea 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
      January14°F30°F21°F1.4"
      February17°F33°F24°F2.7"
      March31°F50°F39°F3.7"
      April40°F63°F50°F7.2"
      May52°F74°F62°F7.7"
      June62°F82°F72°F7.8"
      July65°F85°F74°F7.6"
      August63°F82°F72°F7.4"
      September54°F77°F64°F7.1"
      October43°F64°F53°F6.9"
      November32°F50°F40°F3.7"
      December20°F35°F27°F5.3"

      Chelsea 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.
      IndexChelseaIowaNational
      Air quality index393950
      Pollution index416,1141,643,8365,066,862

      Chelsea air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality287
      Days with moderate air quality78
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Chelsea air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.004%
      Carbon Tetrachloride0.001%
      Lead0.000%
      Mercury0.000%

      Average monthly Chelsea temperature with heat index

      Chelsea monthly precipitation with daily maximum

      Chelsea monthly snow depth with daily maximum

      Chelsea monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Belle Plaine, IA2,5623922%
      Elberon, IA1933922%
      Ladora, IA3083922%
      Luzerne, IA1383922%
      Hartwick, IA983922%
      Chelsea, IA2423922%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Comfort, WV2424020%
      Empire, OH242468%
      Madisonburg, PA2424412%
      Etowah, AR2424510%
      West Leipsic, OH2423922%
      Chelsea, IA2423922%
      Source: The Chelsea, 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.