TODAY NOV07
TEMPERATURE60
HUMIDITY51
PRESSURE102610
WIND COND.20 11.2
  • 6244Fri
  • 6147Sat80%20%
  • 6442Sun
  • 6644
  • 6953Tue20%
daynightWeather update from Jefferson City, Jefferson City Memorial Airport at
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Weather Quick Facts

  • The highest monthly average temperature in St. Thomas for August is 80.1 degrees
  • The lowest monthly average temperature in St. Thomas for January is 33.1 degrees
  • The most monthly precipitation in St. Thomas occurs in August with 13.2 inches
  • The air quality index in St. Thomas is 7% better than the national average
  • The pollution index in St. Thomas is 71% better than the national average

Compare St. Thomas, MO Weather

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      St. Thomas 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
      January26°F43°F33°F9.7"
      February27°F46°F35°F3.9"
      March38°F62°F49°F4.6"
      April45°F68°F56°F6.4"
      May57°F79°F68°F3.6"
      June66°F87°F76°F8.9"
      July67°F90°F79°F2.3"
      August70°F91°F80°F13.2"
      September61°F83°F71°F7.3"
      October49°F71°F59°F4.0"
      November37°F59°F47°F4.3"
      December26°F43°F34°F4.1"

      St. Thomas 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.
      IndexSt. ThomasMissouriNational
      Air quality index399742
      Pollution index803,1861,630,2552,726,193

      St. Thomas air quality

      MeasurementTotal
      Days measured245
      Days with good air quality238
      Days with moderate air quality7
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

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

      Average monthly St. Thomas temperature with heat index

      St. Thomas monthly precipitation with daily maximum

      St. Thomas monthly snow depth with daily maximum

      St. Thomas monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Vienna, MO8973922.0%
      Lohman, MO2103922.0%
      Argyle, MO1683922.0%
      Meta, MO1723922.0%
      Russellville, MO8323922.0%
      St. Thomas, MO2923922.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Idledale, CO2925816.0%
      Baldwin, IL292548.0%
      Campbell Hill, IL2924314.0%
      Joy, IL2923236.0%
      Vallonia, IN2923530.0%
      St. Thomas, MO2923922.0%
      Source: The St. Thomas, 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.