TODAY JUN21
TEMPERATURE71
HUMIDITY95
PRESSURE29.78
WIND COND.240 8.1
  • 846540%60%
  • 7863Fri60%60%
  • 8267Sat30%
  • 8668Sun40%
  • 8670Mon
daynightWeather update from St. Louis Regional Airport at

East Alton 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
January-4°F72°F35°Fn/a
February3°F75°F33°Fn/a
March12°F82°F45°Fn/a
April23°F90°F56°Fn/a
May36°F91°F64°Fn/a
June52°F95°F75°Fn/a
July54°F102°F77°Fn/a
August55°F102°F77°Fn/a
September41°F95°F69°Fn/a
October27°F95°F56°Fn/a
November16°F81°F46°Fn/a
December1°F66°F35°Fn/a

Did you know?

  • The highest monthly average temperature in East Alton for August is 77 degrees.
  • The lowest monthly average temperature in East Alton for February is 33 degrees.
  • The most monthly precipitation in East Alton occurs in January with 0 inches.
  • The air quality index in East Alton is 20% worse than the national average.
  • The pollution index in East Alton is 67% worse than the national average.

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Compare East Alton, IL Weather To Other Cities

East 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.
IndexEast AltonIllinoisNational
Air quality index604150
Pollution index8,473,0503,347,2955,066,862

East 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

East Alton air quality information

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

Average monthly East Alton temperature with heat index

East Alton monthly precipitation with daily maximum

East Alton monthly snow depth with daily maximum

East Alton monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Bethalto, IL9,3646020%
Dorchester, IL1336020%
Godfrey, IL17,8096020%
Holiday Shores, IL2,7856020%
Mount Clare, IL2376020%
East Alton, IL6,1716020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Holly, MI6,1713824%
Schuyler, NE6,1713432%
Heathcote, NJ6,1724020%
Guadalupe, AZ6,1727448%
Chillicothe, IL6,169484%
East Alton, IL6,1716020%
Source: The East Alton, 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.