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Key findings

  • The highest monthly average temperature in Slidell for July is 83 degrees
  • The lowest monthly average temperature in Slidell for January is 54 degrees
  • The most monthly precipitation in Slidell occurs in May with 20 inches
  • The air quality index in Slidell is 10% better than the national average
  • The pollution index in Slidell is 7% better than the national average

Compare Slidell, LA Weather

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      Slidell 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
      January45°F66°F54°F10.3"
      February47°F71°F59°F5.5"
      March56°F75°F65°F10.4"
      April58°F79°F69°F16.1"
      May64°F83°F73°F20.0"
      June71°F90°F80°F11.6"
      July74°F93°F83°F6.7"
      August73°F92°F81°F12.4"
      September68°F89°F78°F8.8"
      October58°F83°F70°F8.6"
      November51°F75°F62°F8.3"
      December48°F68°F57°F12.2"

      Slidell 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.
      IndexSlidellLouisianaNational
      Air quality index4510650
      Pollution index4,700,7102,540,2835,066,862

      Slidell air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality229
      Days with moderate air quality134
      Days w/ poor A.Q. for sensitive groups2
      Days with unhealthy air quality0

      Slidell air quality information

      PollutantTotal
      Arsenic0.003%
      Benzene0.060%
      Carbon Tetrachloride0.010%
      Lead0.030%
      Mercury0.001%

      Average monthly Slidell temperature with heat index

      Slidell monthly precipitation with daily maximum

      Slidell monthly snow depth with daily maximum

      Slidell monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Abita Springs, LA2,4773040%
      Eden Isle, LA7,3734510%
      Nicholson, MS2,7754510%
      Lacombe, LA7,9304510%
      Pearlington, MS1,3504510%
      Slidell, LA27,6974510%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Stockbridge, GA27,692524%
      Maywood, CA27,6727244%
      Forest Hills, MI27,6673824%
      Crofton, MD27,663476%
      Greer, SC27,739468%
      Slidell, LA27,6974510%
      Source: The Slidell, LA 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.