TODAY NOV21
TEMPERATURE70
HUMIDITY17
PRESSURE102336.66
WIND COND.
  • 7058Fri
  • 7465Sat
  • 7970Sun
  • 8166Mon
  • 7767Tue
daynightWeather update from La Porte Municipal Airport at
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Weather Quick Facts

  • The highest monthly average temperature in San Leon for August is 85.3 degrees
  • The lowest monthly average temperature in San Leon for January is 55.6 degrees
  • The most monthly precipitation in San Leon occurs in August with 6.2 inches
  • The air quality index in San Leon is 24% worse than the national average
  • The pollution index in San Leon is 229% worse than the national average

Compare San Leon, TX Weather

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      San Leon 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
      January49°F63°F56°F3.7"
      February52°F66°F58°F2.2"
      March59°F72°F65°F3.2"
      April66°F78°F71°F2.8"
      May72°F83°F77°F2.7"
      June79°F89°F83°F3.8"
      July80°F90°F85°F4.0"
      August80°F91°F85°F6.2"
      September77°F88°F82°F5.0"
      October69°F82°F75°F4.5"
      November60°F73°F66°F3.0"
      December52°F65°F58°F4.2"

      San Leon 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.
      IndexSan LeonTexasNational
      Air quality index525242
      Pollution index8,978,9902,009,3002,726,193

      San Leon air quality

      MeasurementTotal
      Days measured365
      Days with good air quality171
      Days with moderate air quality163
      Days w/ poor A.Q. for sensitive groups26
      Days with unhealthy air quality4

      Air quality details

      PollutantTotal
      Arsenic0.020%
      Benzene0.070%
      Carbon Tetrachloride0.150%
      Lead0.040%
      Mercury0.050%

      Average monthly San Leon temperature with heat index

      San Leon monthly precipitation with daily maximum

      San Leon monthly snow depth with daily maximum

      San Leon monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      El Lago, TX2,805524.0%
      Seabrook, TX13,849524.0%
      Bacliff, TX11,513524.0%
      Hitchcock, TX7,831524.0%
      Santa Fe, TX13,326524.0%
      San Leon, TX5,439524.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Cottleville, MO5,439548.0%
      Eagleville, PA5,439512.0%
      Carver, MN5,438468.0%
      L'Épiphanie, QC5,436n/a 
      Cottonwood, CA5,4354216.0%
      San Leon, TX5,439524.0%
      Source: The San Leon, TX 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.