TODAY NOV21
TEMPERATURE38
HUMIDITY75
PRESSURE101050
WIND COND.300 25.9
  • 4327Fri
  • 4430Sat
  • 4830Sun20%
  • 3920Mon20%
  • 3419Tue
daynightWeather update from Prairie Du Chien Municipal Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Harpers Ferry for July is 72.7 degrees
  • The lowest monthly average temperature in Harpers Ferry for January is 20.7 degrees
  • The most monthly precipitation in Harpers Ferry occurs in June with 8 inches
  • The air quality index in Harpers Ferry is 17% better than the national average
  • The pollution index in Harpers Ferry is 30% 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 index353942
      Pollution index1,904,1201,154,5352,726,193

      Harpers Ferry air quality

      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

      Air quality details

      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

      CityPopulationAir Quality IndexNational Avg.
      McGregor, IA8372942.0%
      Marquette, IA4482942.0%
      Eastman, WI3972942.0%
      Steuben, WI1162942.0%
      Monona, IA1,6392942.0%
      Harpers Ferry, IA2483530.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Trinity Village, CA2482746.0%
      Vernon, CA2487244.0%
      Bartow, GA248476.0%
      Girard, GA248476.0%
      Westside, IA2483530.0%
      Harpers Ferry, IA2483530.0%
      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.