TODAY MAR04
TEMPERATURE43
HUMIDITY65
PRESSURE30.22
WIND COND.130 20.5
  • 5127Fri
  • 5738Sat
  • 6137Sun
  • 6143Mon
  • 6342Tue30%
daynightWeather update from Spencer, Spencer Municipal Airport at

Key findings

  • The highest monthly average temperature in Royal for July is 74 degrees
  • The lowest monthly average temperature in Royal for January is 17 degrees
  • The most monthly precipitation in Royal occurs in June with 5 inches
  • The air quality index in Royal is 30% better than the national average
  • The pollution index in Royal is 85% better than the national average

Compare Royal, IA Weather

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      Royal 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°F27°F17°F0.3"
      February10°F30°F19°F0.5"
      March26°F46°F34°F1.2"
      April36°F61°F47°F2.9"
      May48°F73°F59°F4.0"
      June58°F82°F70°F5.0"
      July62°F86°F74°F3.2"
      August59°F82°F70°F4.3"
      September51°F77°F63°F2.9"
      October39°F63°F49°F2.3"
      November25°F48°F36°F0.9"
      December12°F30°F21°F0.8"

      Royal 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.
      IndexRoyalIowaNational
      Air quality index353950
      Pollution index769,6971,643,8365,066,862

      Royal air quality information

      MeasurementTotal
      Days measured364
      Days with good air quality322
      Days with moderate air quality42
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Royal air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.010%
      Carbon Tetrachloride0.001%
      Lead0.002%
      Mercury0.000%

      Average monthly Royal temperature with heat index

      Royal monthly precipitation with daily maximum

      Royal monthly snow depth with daily maximum

      Royal monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Sioux Rapids, IA7293530%
      Larrabee, IA2023530%
      Hartley, IA1,7173530%
      Rossie, IA503530%
      Webb, IA1863530%
      Royal, IA4153530%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Avery, TX4153922%
      Clifton, ID4154412%
      Cumming, IA4153922%
      Hayti, SD4152550%
      Edgar, NE4151962%
      Royal, IA4153530%
      Source: The Royal, 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.