TODAY DEC15
TEMPERATURE43
HUMIDITY93
PRESSURE30.05
WIND COND.
  • 4629Sat80%
  • 5230Sun
  • 4628Mon
  • 4533Tue
  • 5240Wed30%
daynightWeather update from St. Louis Downtown Airport at

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Swansea 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"

Did you know?

  • The highest monthly average temperature in Swansea for July is 78 degrees.
  • The lowest monthly average temperature in Swansea for January is 32 degrees.
  • The most monthly precipitation in Swansea occurs in April with 10.2 inches.
  • The air quality index in Swansea is 20% worse than the national average.
  • The pollution index in Swansea is 19% worse than the national average.

Real Estate Listings In Swansea

Compare Swansea, IL Weather To Other Cities

Swansea 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.
IndexSwanseaIllinoisNational
Air quality index604150
Pollution index6,055,6403,347,2955,066,862

Swansea 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

Swansea air quality information

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

Average monthly Swansea temperature with heat index

Swansea monthly precipitation with daily maximum

Swansea monthly snow depth with daily maximum

Swansea monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Brooklyn, IL7406020%
Collinsville, IL24,8556020%
East St. Louis, IL26,7316020%
Floraville, IL06020%
Lebanon, IL4,3696020%
Swansea, IL13,7226020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Jericho, NY13,730536%
Ephrata, PA13,7144510%
Wixom, MI13,7333432%
Riverhead, NY13,734492%
Belle Chasse, LA13,7094510%
Swansea, IL13,7226020%
Source: The Swansea, 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.