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Key findings

  • The highest monthly average temperature in Greenfield for July is 74 degrees
  • The lowest monthly average temperature in Greenfield for January is 21 degrees
  • The most monthly precipitation in Greenfield occurs in August with 2.2 inches
  • The air quality index in Greenfield is 22% better than the national average
  • The pollution index in Greenfield is 74% better than the national average

Compare Greenfield, IA Weather

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      Greenfield 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
      January12°F31°F21°F0.7"
      February15°F35°F24°F0.6"
      March29°F50°F38°F1.0"
      April40°F64°F51°F1.2"
      May50°F75°F62°F1.5"
      June61°F84°F72°F1.9"
      July63°F86°F74°F1.3"
      August61°F83°F71°F2.2"
      September53°F79°F65°F2.1"
      October41°F67°F53°F1.6"
      November30°F52°F39°F0.8"
      December18°F37°F26°F0.9"

      Greenfield 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.
      IndexGreenfieldIowaNational
      Air quality index393950
      Pollution index1,337,3801,643,8365,066,862

      Greenfield air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality306
      Days with moderate air quality59
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Greenfield air quality information

      PollutantTotal
      Arsenic0.040%
      Benzene0.010%
      Carbon Tetrachloride0.002%
      Lead0.190%
      Mercury0.160%

      Average monthly Greenfield temperature with heat index

      Greenfield monthly precipitation with daily maximum

      Greenfield monthly snow depth with daily maximum

      Greenfield monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Dexter, IA8243922%
      Macksburg, IA1213922%
      Menlo, IA4103922%
      Orient, IA4263922%
      Adair, IA8133922%
      Greenfield, IA1,9513922%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Fall Branch, TN1,9514510%
      Mannington, WV1,9513138%
      Gila Bend, AZ1,9527448%
      Albany, KY1,9524020%
      North Warren, PA1,952982%
      Greenfield, IA1,9513922%
      Source: The Greenfield, 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.