TODAY DEC14
TEMPERATURE44
HUMIDITY96
PRESSURE30.05
WIND COND.360 16.1
  • 4731Sat60%
  • 5131Sun
  • 4929Mon
  • 4735Tue
  • 5238Wed
daynightWeather update from St. Louis, Lambert-St. Louis International Airport at

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St. John 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
January24°F45°F33°F2.4"
February25°F48°F35°F2.2"
March37°F61°F48°F3.6"
April47°F72°F59°F5.4"
May57°F80°F68°F4.6"
June67°F89°F78°F5.2"
July70°F92°F81°F4.2"
August69°F91°F79°F3.6"
September61°F84°F72°F4.3"
October48°F72°F60°F3.4"
November37°F60°F48°F3.4"
December27°F47°F37°F3.5"

Did you know?

  • The highest monthly average temperature in St. John for July is 81 degrees.
  • The lowest monthly average temperature in St. John for January is 33 degrees.
  • The most monthly precipitation in St. John occurs in April with 5.4 inches.
  • The air quality index in St. John is 20% worse than the national average.
  • The pollution index in St. John is 67% worse than the national average.

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Compare St. John, MO Weather To Other Cities

St. John 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. JohnMissouriNational
Air quality index609750
Pollution index8,473,0502,360,5665,066,862

St. John air quality information

MeasurementTotal
Days measured365
Days with good air quality99
Days with moderate air quality231
Days w/ poor A.Q. for sensitive groups33
Days with unhealthy air quality2

St. John air quality information

PollutantTotal
Arsenic0.020%
Benzene0.070%
Carbon Tetrachloride0.020%
Lead0.010%
Mercury0.010%

Average monthly St. John temperature with heat index

St. John monthly precipitation with daily maximum

St. John monthly snow depth with daily maximum

St. John monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Alton, IL27,1756020%
Dupo, IL3,9666020%
Fairmont City, IL2,3496020%
Mitchell, IL1,1836020%
Venice, IL1,8986020%
St. John, MO6,4596020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
East Porterville, CA6,4607448%
Hurricane, WV6,4603432%
Combee Settlement, FL6,4623628%
Buena Vista, MI6,462285470%
Columbiana, OH6,4634510%
St. John, MO6,4596020%
Source: The St. John, 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.