TODAY MAY07
TEMPERATURE64
HUMIDITY49
PRESSURE30.1
WIND COND.250 20.5
  • 5753Sat40%70%
  • 6544Sun90%60%
  • 6144Mon
  • 6245Tue
  • 6247Wed20%30%
daynightWeather update from St. Louis Regional Airport at

Key findings

  • The highest monthly average temperature in St. Jacob for July is 77.9 degrees
  • The lowest monthly average temperature in St. Jacob for January is 31.8 degrees
  • The most monthly precipitation in St. Jacob occurs in April with 10.2 inches
  • The air quality index in St. Jacob is 9% worse than the national average
  • The pollution index in St. Jacob is 20% worse than the national average

Compare St. Jacob, IL Weather

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      St. Jacob 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°F42°F32°F5.6"
      February25°F45°F34°F3.8"
      March37°F59°F47°F7.1"
      April47°F70°F57°F10.2"
      May56°F77°F66°F8.9"
      June65°F87°F76°F9.2"
      July68°F89°F78°F8.0"
      August66°F88°F76°F7.8"
      September58°F82°F69°F8.4"
      October47°F70°F57°F8.6"
      November36°F57°F46°F6.9"
      December28°F45°F36°F8.2"

      St. Jacob 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. JacobIllinoisNational
      Air quality index544150
      Pollution index6,055,6403,347,2955,066,862

      St. Jacob air quality information

      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

      St. Jacob air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.070%
      Carbon Tetrachloride0.040%
      Lead0.100%
      Mercury0.230%

      Average monthly St. Jacob temperature with heat index

      St. Jacob monthly precipitation with daily maximum

      St. Jacob monthly snow depth with daily maximum

      St. Jacob monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Germantown, IL1,1594314%
      Breese, IL4,5904314%
      Holiday Shores, IL2,785548%
      Edwardsville, IL25,044548%
      Highland, IL9,839548%
      St. Jacob, IL1,354548%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Lincoln Beach, OR1,3541766%
      Kodiak Station, AK1,3533138%
      Nellieburg, MS1,3553628%
      Wakeman, OH1,35550= 100
      Camargo, KY1,3553334%
      St. Jacob, IL1,354548%
      Source: The St. Jacob, IL 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.