TODAY OCT20
TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.
  • 6432Sat
  • 5335Sun
  • 6041Mon
  • 6340Tue
  • 5943Wed
daynightWeather update from Southern Illinois Airport at
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Royalton 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
January25°F44°F34°F2.3"
February27°F46°F36°F2.5"
March38°F60°F48°F4.8"
April47°F70°F58°F6.2"
May56°F78°F67°F4.9"
June66°F88°F76°F4.1"
July68°F89°F78°F5.0"
August66°F88°F76°F3.5"
September57°F81°F68°F3.4"
October46°F71°F58°F3.6"
November36°F58°F46°F3.7"
December30°F47°F38°F3.7"

Did you know?

  • The highest monthly average temperature in Royalton for July is 78 degrees.
  • The lowest monthly average temperature in Royalton for January is 34 degrees.
  • The most monthly precipitation in Royalton occurs in April with 6.2 inches.
  • The air quality index in Royalton is 21% better than the national average.
  • The pollution index in Royalton is 88% better than the national average.

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Compare Royalton, IL Weather To Other Cities

Royalton 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.
IndexRoyaltonIllinoisNational
Air quality index394150
Pollution index569,1783,347,2955,066,862

Royalton air quality information

MeasurementTotal
Days measured243
Days with good air quality204
Days with moderate air quality39
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Royalton air quality information

PollutantTotal
Arsenic0.001%
Benzene0.020%
Carbon Tetrachloride0.000%
Lead0.000%
Mercury0.000%

Average monthly Royalton temperature with heat index

Royalton monthly precipitation with daily maximum

Royalton monthly snow depth with daily maximum

Royalton monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
West City, IL7893922%
Benton, IL7,1483922%
Carbondale, IL26,0663922%
Crainville, IL1,4563922%
Elkville, IL1,1403922%
Royalton, IL1,1243922%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Alpaugh, CA1,1247448%
Cyril, OK1,1244216%
Stafford, KS1,1243922%
Westlake, TX1,124548%
Kaaawa, HI1,1243040%
Royalton, IL1,1243922%
Source: The Royalton, 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.