TODAY DEC25
TEMPERATURE49
HUMIDITY54
PRESSURE
WIND COND.270 24.1
  • 5134Thu
  • 5534Fri
  • 5936Sat
  • 6136Sun
  • 5829Mon
daynightWeather update from St George Regional Airport at
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Weather Quick Facts

  • The highest monthly average temperature in St. George for July is 89.1 degrees
  • The lowest monthly average temperature in St. George for December is 39.8 degrees
  • The most monthly precipitation in St. George occurs in January with 4.6 inches
  • The air quality index in St. George is 5% worse than the national average
  • The pollution index in St. George is 43% better than the national average

Compare St. George, UT Weather

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      St. George 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
      January31°F53°F41°F4.6"
      February36°F61°F47°F1.8"
      March43°F70°F55°F2.5"
      April49°F77°F62°F1.2"
      May59°F87°F72°F1.2"
      June69°F99°F85°F2.1"
      July76°F103°F89°F3.2"
      August72°F100°F85°F2.1"
      September65°F93°F78°F1.3"
      October52°F79°F64°F3.3"
      November40°F65°F51°F0.9"
      December31°F51°F40°F1.9"

      St. George 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.
      IndexSt. GeorgeUtahNational
      Air quality index444542
      Pollution index1,560,3803,340,3692,726,193

      St. George air quality

      MeasurementTotal
      Days measured365
      Days with good air quality291
      Days with moderate air quality74
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.002%
      Benzene0.020%
      Carbon Tetrachloride0.000%
      Lead0.010%
      Mercury0.002%

      Average monthly St. George temperature with heat index

      St. George monthly precipitation with daily maximum

      St. George monthly snow depth with daily maximum

      St. George monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Santa Clara, UT7,8684412.0%
      Leeds, UT6524412.0%
      Washington, UT28,1924412.0%
      Toquerville, UT1,6894412.0%
      Ivins, UT8,9314412.0%
      St. George, UT87,1764412.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Ogden, UT87,1754510.0%
      Waukegan, IL87,1573922.0%
      Repentigny, QC87,645n/a 
      Newport Beach, CA86,6948978.0%
      Citrus Heights, CA87,665524.0%
      St. George, UT87,1764412.0%
      Source: The St. George, 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.