TODAY NOV25
TEMPERATURE50
HUMIDITY66
PRESSURE101120
WIND COND.330 27.7
  • 4122Mon
  • 4330Tue
  • 4421Wed30%
  • 3517
  • 3318Fri
daynightWeather update from St. Joseph, Rosecrans Memorial Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Union Star for July is 78.2 degrees
  • The lowest monthly average temperature in Union Star for January is 27.5 degrees
  • The most monthly precipitation in Union Star occurs in June with 5.2 inches
  • The air quality index in Union Star is 2% worse than the national average
  • The pollution index in Union Star is 86% better than the national average

Compare Union Star, MO Weather

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      Union Star 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°F40°F27°F0.6"
      February20°F43°F31°F1.1"
      March34°F58°F44°F2.3"
      April44°F68°F55°F4.1"
      May54°F77°F65°F5.1"
      June65°F87°F75°F5.2"
      July68°F89°F78°F3.6"
      August65°F87°F75°F4.1"
      September56°F81°F68°F3.7"
      October44°F69°F55°F3.6"
      November32°F56°F43°F1.7"
      December21°F41°F30°F1.6"

      Union Star 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.
      IndexUnion StarMissouriNational
      Air quality index439742
      Pollution index393,0711,630,2552,726,193

      Union Star air quality

      MeasurementTotal
      Days measured365
      Days with good air quality283
      Days with moderate air quality82
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

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

      Average monthly Union Star temperature with heat index

      Union Star monthly precipitation with daily maximum

      Union Star monthly snow depth with daily maximum

      Union Star monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Maysville, MO1,1424314.0%
      King City, MO9454314.0%
      Amity, MO564314.0%
      Barnard, MO2544314.0%
      Rea, MO264314.0%
      Union Star, MO5554314.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Woodlawn, IL5554314.0%
      North Chevy Chase, MD555476.0%
      Naples, ME5553138.0%
      Big Bay, MI555884.0%
      Brownton, MN555468.0%
      Union Star, MO5554314.0%
      Source: The Union Star, MO 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.