TODAY MAY09
TEMPERATURE46
HUMIDITY61
PRESSURE30.06
WIND COND.150 20.5
  • 4535Mon90%90%
  • 4534Tue50%30%
  • 5941Wed
  • 7348Thu
  • 7448Fri
daynightWeather update from Broomfield / Jeffco at

Key findings

  • The highest monthly average temperature in Louisville for July is 74.7 degrees
  • The lowest monthly average temperature in Louisville for December is 29.7 degrees
  • The most monthly precipitation in Louisville occurs in November with 2.6 inches
  • The air quality index in Louisville is 5% better than the national average
  • The pollution index in Louisville is 70% better than the national average

Compare Louisville, CO Weather

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      Louisville 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
      January18°F48°F32°F1.2"
      February21°F50°F34°F1.5"
      March30°F62°F44°F1.6"
      April36°F66°F49°F0.2"
      May43°F73°F57°F2.4"
      June54°F89°F71°F1.1"
      July59°F92°F75°F2.1"
      August56°F90°F72°F1.1"
      September49°F82°F64°F0.2"
      October38°F69°F52°F2.1"
      November28°F58°F41°F2.6"
      December17°F46°F30°F0.7"

      Louisville 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.
      IndexLouisvilleColoradoNational
      Air quality index473850
      Pollution index1,498,6502,034,6195,066,862

      Louisville air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality227
      Days with moderate air quality133
      Days w/ poor A.Q. for sensitive groups5
      Days with unhealthy air quality0

      Louisville air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.030%
      Carbon Tetrachloride0.002%
      Lead0.010%
      Mercury0.001%

      Average monthly Louisville temperature with heat index

      Louisville monthly precipitation with daily maximum

      Louisville monthly snow depth with daily maximum

      Louisville monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Coal Creek town, CO308476%
      Paragon Estates, CO892476%
      Broomfield, CO62,449476%
      Firestone, CO11,709476%
      Longmont, CO90,719476%
      Louisville, CO19,972476%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Haslett, MI19,9513628%
      Lake Zurich, IL19,9505510%
      Shenandoah, LA19,9994510%
      Franconia, VA19,935476%
      Warrensburg, MO19,932476%
      Louisville, CO19,972476%
      Source: The Louisville, CO 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.