TODAY AUG20
TEMPERATURE68
HUMIDITY96
PRESSURE30.04
WIND COND.
  • 8267Mon50%
  • 7656Tue80%50%
  • 7653Wed
  • 7856Thu
  • 7961Fri
daynightWeather update from Alma, Gratiot Community Airport at

St. Louis Average Weather

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
January17°F31°F24°F3.1"
February16°F31°F24°F3.1"
March26°F44°F34°F3.6"
April35°F58°F46°F5.0"
May46°F71°F58°F5.0"
June55°F78°F66°F8.8"
July59°F82°F71°F5.0"
August58°F80°F69°F6.1"
September51°F73°F61°F5.6"
October41°F61°F50°F6.2"
November32°F48°F39°F3.5"
December23°F35°F29°F2.7"

Did you know?

  • The highest monthly average temperature in St. Louis for July is 71 degrees.
  • The lowest monthly average temperature in St. Louis for February is 24 degrees.
  • The most monthly precipitation in St. Louis occurs in June with 8.8 inches.
  • The air quality index in St. Louis is 473% worse than the national average.
  • The pollution index in St. Louis is 72% better than the national average.

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Compare St. Louis, MI Weather To Other Cities

St. Louis 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. LouisMichiganNational
Air quality index2856950
Pollution index1,401,4504,018,8005,066,862

St. Louis air quality information

MeasurementTotal
Days measured114
Days with good air quality94
Days with moderate air quality20
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

St. Louis air quality information

PollutantTotal
Arsenic0.001%
Benzene0.020%
Carbon Tetrachloride0.002%
Lead0.005%
Mercury0.000%

Average monthly St. Louis temperature with heat index

St. Louis monthly precipitation with daily maximum

St. Louis monthly snow depth with daily maximum

St. Louis monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Ithaca, MI2,8463432%
Merrill, MI717285470%
Alma, MI9,222285470%
Mount Pleasant, MI25,896285470%
Breckenridge, MI1,160285470%
St. Louis, MI7,302285470%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Nebraska City, NE7,303484%
Palmyra, NJ7,2995714%
Devils Lake, ND7,2993432%
Corbin, KY7,3063628%
Dayton, TN7,308198%
St. Louis, MI7,302285470%
Source: The St. Louis, MI 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.