TODAY APR20
TEMPERATURE38
HUMIDITY34
PRESSURE30.13
WIND COND.310 13
  • 6332Mon
  • 5738Tue
  • 6341Wed20%
  • 6343Thu
  • 6847Fri
daynightWeather update from Ogden-Hinckley Airport at

Key findings

  • The highest monthly average temperature in Roy for July is 79.3 degrees
  • The lowest monthly average temperature in Roy for January is 26.9 degrees
  • The most monthly precipitation in Roy occurs in May with 2.5 inches
  • The air quality index in Roy is 10% better than the national average
  • The pollution index in Roy is 236% worse than the national average

Compare Roy, UT Weather

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      Roy 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°F1.8"
      February26°F43°F34°F1.3"
      March33°F55°F43°F1.7"
      April38°F62°F49°F2.3"
      May46°F72°F58°F2.5"
      June55°F85°F70°F1.1"
      July65°F94°F79°F0.3"
      August63°F90°F76°F0.8"
      September53°F80°F66°F1.5"
      October42°F65°F52°F1.7"
      November32°F52°F40°F1.1"
      December22°F37°F29°F1.7"

      Roy 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.
      IndexRoyUtahNational
      Air quality index454550
      Pollution index17,030,3006,755,1215,066,862

      Roy air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality244
      Days with moderate air quality113
      Days w/ poor A.Q. for sensitive groups8
      Days with unhealthy air quality0

      Roy air quality information

      PollutantTotal
      Arsenic0.280%
      Benzene0.230%
      Carbon Tetrachloride0.000%
      Lead0.360%
      Mercury0.040%

      Average monthly Roy temperature with heat index

      Roy monthly precipitation with daily maximum

      Roy monthly snow depth with daily maximum

      Roy monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Clinton, UT21,2104510%
      Sunset, UT5,1764510%
      Harrisville, UT6,0714510%
      Mountain Green, UT3,1134510%
      Pleasant View, UT8,9404510%
      Roy, UT37,8534510%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Lima, OH37,8363922%
      Gainesville, GA37,9063726%
      Apache Junction, AZ37,7757448%
      Chillum, MD37,773476%
      Brookfield, WI37,9914412%
      Roy, UT37,8534510%
      Source: The Roy, UT 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.