TODAY NOV21
TEMPERATURE28
HUMIDITY100
PRESSURE30.27
WIND COND.210 5.8
  • 5639
  • 5143Fri90%
  • 5945Sat
  • 5531Sun70%40%
  • 3825Mon
daynightWeather update from St. Louis Regional Airport at

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West Alton 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°F41°F31°F3.4"
February25°F43°F33°F3.7"
March38°F57°F46°F3.1"
April47°F68°F56°F6.6"
May56°F76°F65°F6.1"
June65°F85°F75°F3.5"
July67°F87°F77°F7.3"
August66°F86°F75°F6.8"
September58°F80°F68°F4.4"
October47°F68°F57°F6.7"
November36°F56°F45°F4.9"
December28°F43°F35°F6.3"

Did you know?

  • The highest monthly average temperature in West Alton for July is 77 degrees.
  • The lowest monthly average temperature in West Alton for January is 31 degrees.
  • The most monthly precipitation in West Alton occurs in July with 7.3 inches.
  • The air quality index in West Alton is 20% worse than the national average.
  • The pollution index in West Alton is 67% worse than the national average.

Real Estate Listings In West Alton

Compare West Alton, MO Weather To Other Cities

West Alton 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.
IndexWest AltonMissouriNational
Air quality index609750
Pollution index8,473,0502,360,5665,066,862

West Alton 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

West Alton air quality information

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

Average monthly West Alton temperature with heat index

West Alton monthly precipitation with daily maximum

West Alton monthly snow depth with daily maximum

West Alton monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Bethalto, IL9,3646020%
Collinsville, IL24,8556020%
Fairmont City, IL2,3496020%
Granite City, IL29,6626020%
Maryville, IL7,8376020%
West Alton, MO4676020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Cobb, WI4673236%
Craigmont, ID4673138%
Hampton, NE467265430%
Danville, MD4673236%
Loghill Village, CO4674314%
West Alton, MO4676020%
Source: The West Alton, 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.