TODAY AUG19
TEMPERATURE76
HUMIDITY74
PRESSURE29.92
WIND COND.150 5.8
  • 7157Mon70%60%
  • 7451Tue
  • 7757Wed
  • 8064Thu30%
  • 8262Fri60%
daynightWeather update from Spencer, Spencer Municipal Airport at

Royal Average Weather

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"

Did you know?

  • 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 17% better than the national average.
  • The pollution index in Royal is 84% better 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.
IndexRoyalIowaNational
Air quality index413950
Pollution index769,6971,643,8365,066,862

Royal air quality information

MeasurementTotal
Days measured365
Days with good air quality254
Days with moderate air quality110
Days w/ poor A.Q. for sensitive groups1
Days with unhealthy air quality

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.
Dickens, IA2044118%
Greenville, IA934118%
Peterson, IA3004118%
Sutherland, IA5954118%
Everly, IA6244118%
Royal, IA4154118%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Hayti, SD4153628%
Kingston, MI4153824%
Clifton, ID415476%
Edison, OH4153628%
Mesick, MI4153530%
Royal, IA4154118%
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.