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Key findings

  • The highest monthly average temperature in West Branch for July is 75 degrees
  • The lowest monthly average temperature in West Branch for January is 23 degrees
  • The most monthly precipitation in West Branch occurs in June with 6.1 inches
  • The air quality index in West Branch is 30% better than the national average
  • The pollution index in West Branch is 83% better than the national average

Compare West Branch, IA Weather

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      West Branch 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
      January15°F32°F23°F1.0"
      February17°F35°F25°F1.1"
      March30°F51°F39°F2.4"
      April41°F64°F52°F4.8"
      May51°F74°F62°F4.6"
      June62°F84°F73°F6.1"
      July66°F86°F75°F4.7"
      August64°F84°F73°F4.5"
      September55°F78°F66°F3.3"
      October43°F65°F53°F3.3"
      November31°F51°F40°F1.9"
      December19°F35°F27°F1.9"

      West Branch 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.
      IndexWest BranchIowaNational
      Air quality index353950
      Pollution index876,9961,643,8365,066,862

      West Branch air quality information

      MeasurementTotal
      Days measured364
      Days with good air quality278
      Days with moderate air quality86
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      West Branch air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.010%
      Carbon Tetrachloride0.001%
      Lead0.000%
      Mercury0.000%

      Average monthly West Branch temperature with heat index

      West Branch monthly precipitation with daily maximum

      West Branch monthly snow depth with daily maximum

      West Branch monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Atalissa, IA3393236%
      Rochester, IA363236%
      Nichols, IA3603236%
      West Liberty, IA3,7373236%
      Iowa City, IA72,3853530%
      West Branch, IA2,5813530%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      East Williston, NY2,581512%
      Chester, WV2,581688%
      Chester Heights, PA2,581512%
      Horseheads North, NY2,5813530%
      Moundville, AL2,5803530%
      West Branch, IA2,5813530%
      Source: The West Branch, 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.