TODAY MAY16
TEMPERATURE61
HUMIDITY82
PRESSURE30.07
WIND COND.100 13
  • 7157Mon40%50%
  • 7359Tue50%60%
  • 7560Wed60%
  • 7762Thu
  • 7863Fri
daynightWeather update from Audubon, Audubon County Airport at

Key findings

  • The highest monthly average temperature in Harlan for July is 78.2 degrees
  • The lowest monthly average temperature in Harlan for January is 23.9 degrees
  • The most monthly precipitation in Harlan occurs in August with 6.1 inches
  • The air quality index in Harlan is 20% better than the national average
  • The pollution index in Harlan is 14% better than the national average

Compare Harlan, IA Weather

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      Harlan 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°F37°F24°F0.6"
      February16°F41°F27°F0.9"
      March29°F56°F41°F1.5"
      April40°F67°F53°F3.8"
      May50°F77°F63°F5.2"
      June62°F87°F74°F4.9"
      July66°F91°F78°F3.1"
      August64°F88°F75°F6.1"
      September55°F82°F67°F3.7"
      October42°F69°F54°F3.0"
      November29°F55°F41°F1.0"
      December17°F39°F27°F1.7"

      Harlan 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.
      IndexHarlanIowaNational
      Air quality index403950
      Pollution index4,349,9301,643,8365,066,862

      Harlan air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality283
      Days with moderate air quality82
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Harlan air quality information

      PollutantTotal
      Arsenic0.210%
      Benzene0.040%
      Carbon Tetrachloride0.004%
      Lead0.100%
      Mercury0.160%

      Average monthly Harlan temperature with heat index

      Harlan monthly precipitation with daily maximum

      Harlan monthly snow depth with daily maximum

      Harlan monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Defiance, IA2404020%
      Westphalia, IA1304020%
      Kimballton, IA3394020%
      Tennant, IA734020%
      Marne, IA1204020%
      Harlan, IA5,0084020%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Demarest, NJ5,007512%
      Kahaluu, HI5,0093040%
      Auburn, IL5,0064020%
      Whiskey Creek, FL5,0113628%
      Holbrook, AZ5,0114412%
      Harlan, IA5,0084020%
      Source: The Harlan, 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.