TODAY MAR28
TEMPERATURE73
HUMIDITY26
PRESSURE102200
WIND COND.320 11.2
  • 7556Fri
  • 7960Sat
  • 8266Sun
  • 8568Mon
  • 8456Tue
daynightWeather update from Baton Rouge, Baton Rouge Metropolitan, Ryan Field at
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Weather Quick Facts

  • The highest monthly average temperature in Union for July is 80.8 degrees
  • The lowest monthly average temperature in Union for January is 52 degrees
  • The most monthly precipitation in Union occurs in May with 18.2 inches
  • The air quality index in Union is 7% worse than the national average
  • The pollution index in Union is 14% better than the national average

Compare Union, LA Weather

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      Union 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
      January42°F64°F52°F10.7"
      February46°F69°F56°F9.6"
      March52°F74°F62°F9.5"
      April59°F80°F69°F12.2"
      May63°F84°F73°F18.2"
      June72°F89°F80°F8.0"
      July73°F91°F81°F7.0"
      August73°F91°F80°F13.6"
      September70°F89°F78°F8.0"
      October59°F82°F69°F9.8"
      November49°F73°F60°F6.0"
      December47°F68°F56°F6.6"

      Union 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.
      IndexUnionLouisianaNational
      Air quality index4510642
      Pollution index2,337,9902,526,4752,726,193

      Union air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality224
      Days with moderate air quality132
      Days w/ poor A.Q. for sensitive groups9
      Days with unhealthy air quality0

      Union air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.030%
      Carbon Tetrachloride0.004%
      Lead0.002%
      Mercury0.000%

      Average monthly Union temperature with heat index

      Union monthly precipitation with daily maximum

      Union monthly snow depth with daily maximum

      Union monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Lutcher, LA3,2294118.0%
      St. James, LA5964118.0%
      Napoleonville, LA6204118.0%
      Gramercy, LA3,2494118.0%
      North Vacherie, LA1,6414118.0%
      Union, LA6924510.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Arivaca, AZ6923138.0%
      Aroma Park, IL6925510.0%
      Camden, MI6923922.0%
      Stewartsville, MO6924314.0%
      West Winfield, NY6922746.0%
      Union, LA6924510.0%
      Source: The Union, 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.