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Key findings

  • The highest monthly average temperature in Rock Valley for July is 75 degrees
  • The lowest monthly average temperature in Rock Valley for January is 18 degrees
  • The most monthly precipitation in Rock Valley occurs in June with 5.2 inches
  • The air quality index in Rock Valley is 28% better than the national average
  • The pollution index in Rock Valley is 86% better than the national average

Compare Rock Valley, IA Weather

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      Rock Valley 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
      January8°F29°F18°F0.6"
      February10°F34°F21°F0.9"
      March24°F48°F35°F1.3"
      April35°F62°F48°F3.0"
      May45°F73°F59°F3.9"
      June57°F82°F70°F5.2"
      July61°F87°F75°F3.2"
      August59°F84°F71°F4.4"
      September51°F78°F64°F3.2"
      October38°F64°F50°F3.1"
      November24°F49°F36°F1.0"
      December11°F32°F21°F1.4"

      Rock Valley 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.
      IndexRock ValleyIowaNational
      Air quality index363950
      Pollution index731,1451,643,8365,066,862

      Rock Valley air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality321
      Days with moderate air quality43
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Rock Valley air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.010%
      Carbon Tetrachloride0.002%
      Lead0.002%
      Mercury0.000%

      Average monthly Rock Valley temperature with heat index

      Rock Valley monthly precipitation with daily maximum

      Rock Valley monthly snow depth with daily maximum

      Rock Valley monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Alton, IA1,3253530%
      Hawarden, IA2,5383530%
      Sioux Center, IA7,3703530%
      Orange City, IA6,1533530%
      Inwood, IA8793628%
      Rock Valley, IA3,6233628%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Melody Hill, IN3,6234510%
      Avenue B and C, AZ3,6234510%
      Uniontown, OH3,6244314%
      Genesee, CO3,6255816%
      Stanley, WI3,6213432%
      Rock Valley, IA3,6233628%
      Source: The Rock Valley, 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.