TODAY DEC24
TEMPERATURE40
HUMIDITY76
PRESSURE102540
WIND COND.20 13
  • 474450%40%
  • 5247Thu30%40%
  • 5849Fri70%30%
  • 6043Sat40%30%
  • 5738Sun20%
daynightWeather update from St. Louis, Spirit Of St. Louis Airport at
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Weather Quick Facts

  • The highest monthly average temperature in St. Peters for July is 78.7 degrees
  • The lowest monthly average temperature in St. Peters for January is 32.1 degrees
  • The most monthly precipitation in St. Peters occurs in April with 5.3 inches
  • The air quality index in St. Peters is 28% worse than the national average
  • The pollution index in St. Peters is 225% worse than the national average

Compare St. Peters, MO Weather

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      St. Peters 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
      January23°F44°F32°F2.1"
      February25°F46°F35°F1.8"
      March36°F60°F47°F3.7"
      April46°F71°F58°F5.3"
      May55°F78°F66°F4.5"
      June65°F87°F76°F4.8"
      July68°F90°F79°F2.9"
      August66°F89°F77°F3.4"
      September58°F82°F69°F3.9"
      October46°F70°F57°F3.0"
      November36°F59°F46°F2.8"
      December27°F45°F35°F3.1"

      St. Peters 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. PetersMissouriNational
      Air quality index549742
      Pollution index8,870,2301,630,2552,726,193

      St. Peters air quality

      MeasurementTotal
      Days measured365
      Days with good air quality134
      Days with moderate air quality221
      Days w/ poor A.Q. for sensitive groups8
      Days with unhealthy air quality2

      Air quality details

      PollutantTotal
      Arsenic0.180%
      Benzene0.060%
      Carbon Tetrachloride0.020%
      Lead0.030%
      Mercury0.120%

      Average monthly St. Peters temperature with heat index

      St. Peters monthly precipitation with daily maximum

      St. Peters monthly snow depth with daily maximum

      St. Peters monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Brussels, IL113548.0%
      Josephville, MO632548.0%
      Portage Des Sioux, MO305548.0%
      Frontenac, MO3,538548.0%
      Westwood, MO314548.0%
      St. Peters, MO57,536548.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Towson, MD57,542468.0%
      Santee, CA57,4076428.0%
      Midwest City, OK57,392484.0%
      Richland, WA57,3533726.0%
      Bradenton, FL57,3463824.0%
      St. Peters, MO57,536548.0%
      Source: The St. Peters, 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.