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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 27% better than the national average.
  • The pollution index in Royal is 93% worse than the national average.

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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.
Ogden, IL7323628%
Rantoul, IL13,2383628%
Thomasboro, IL1,1223628%
Fairmount, IL6223628%
Homer, IL1,2893628%
Royal, IL2363628%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Bigelow, MN2364020%
Lewisville, OH236476%
Ashland, LA2364314%
Tira, TX236325550%
Burnett, WI2363922%
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.