TODAY JUN07
TEMPERATURE63
HUMIDITY58
PRESSURE30.06
WIND COND.60 11.4
  • 8662Sun
  • 8969Mon
  • 8767Tue30%80%
  • 7960Wed60%40%
  • 7957Thu
daynightWeather update from Rantoul National Aviation Center Airport at
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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
January19°F35°F27°F3.2"
February20°F38°F28°F2.3"
March34°F53°F42°F3.3"
April44°F67°F54°F5.2"
May54°F77°F65°F5.3"
June64°F85°F74°F6.5"
July66°F86°F76°F5.8"
August65°F85°F74°F9.3"
September58°F80°F68°F8.3"
October46°F68°F56°F4.7"
November35°F54°F43°F4.6"
December25°F40°F32°F3.9"

Did you know?

  • The highest monthly average temperature in Royal for July is 76 degrees.
  • The lowest monthly average temperature in Royal for January is 27 degrees.
  • The most monthly precipitation in Royal occurs in August with 9.3 inches.
  • The air quality index in Royal is 28% better than the national average.
  • The pollution index in Royal is 93% worse than the national average.

Compare Royal, IL Weather To Other Cities

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      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.
      IndexRoyalIllinoisNational
      Air quality index364150
      Pollution index9,793,5403,347,2955,066,862

      Royal air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality311
      Days with moderate air quality54
      Days w/ poor A.Q. for sensitive groups
      Days with unhealthy air quality

      Royal air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.070%
      Carbon Tetrachloride0.010%
      Lead0.001%
      Mercury0.040%

      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.
      Gifford, IL8493628%
      Muncie, IL1943628%
      Philo, IL1,6273628%
      Savoy, IL8,1183628%
      Catlin, IL2,0593628%
      Royal, IL2363628%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Omena, MI2363628%
      Donnelly, MN2363628%
      Iron City, TN2363530%
      Nichols, WI2363824%
      Bigelow, MN2364020%
      Royal, IL2363628%
      Source: The Royal, IL 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.