TODAY FEB28
TEMPERATURE35
HUMIDITY85
PRESSURE29.77
WIND COND.120 7.6
  • 4215Sun30%
  • 3213Mon
  • 4429Tue
  • 5127Wed
  • 5127Thu
daynightWeather update from Prairie Du Chien Municipal Airport at

Key findings

  • The highest monthly average temperature in Harpers Ferry for July is 73 degrees
  • The lowest monthly average temperature in Harpers Ferry for January is 21 degrees
  • The most monthly precipitation in Harpers Ferry occurs in June with 8 inches
  • The air quality index in Harpers Ferry is 30% better than the national average
  • The pollution index in Harpers Ferry is 62% better than the national average

Compare Harpers Ferry, IA Weather

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      Harpers Ferry 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°F21°F1.4"
      February14°F32°F22°F1.1"
      March28°F47°F37°F2.8"
      April39°F61°F49°F4.6"
      May50°F72°F60°F5.1"
      June60°F80°F69°F8.0"
      July63°F84°F73°F5.2"
      August61°F82°F71°F5.1"
      September54°F76°F63°F4.2"
      October43°F63°F52°F4.1"
      November31°F49°F39°F3.2"
      December18°F33°F26°F3.2"

      Harpers Ferry 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.
      IndexHarpers FerryIowaNational
      Air quality index353950
      Pollution index1,904,1201,643,8365,066,862

      Harpers Ferry air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality310
      Days with moderate air quality55
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Harpers Ferry air quality information

      PollutantTotal
      Arsenic0.040%
      Benzene0.020%
      Carbon Tetrachloride0.001%
      Lead0.010%
      Mercury0.050%

      Average monthly Harpers Ferry temperature with heat index

      Harpers Ferry monthly precipitation with daily maximum

      Harpers Ferry monthly snow depth with daily maximum

      Harpers Ferry monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Wauzeka, WI7052942%
      Monona, IA1,4952942%
      Prairie du Chien, WI5,7712942%
      McGregor, IA8042942%
      Eastman, WI4192942%
      Harpers Ferry, IA2683530%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Alberta, VA2684412%
      Stewart, OH2682550%
      Bennett, NC2682942%
      Mahnomen CDP, MN2683334%
      Fire Island, NY2684314%
      Harpers Ferry, IA2683530%
      Source: The Harpers Ferry, 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.