Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 23°F | 42°F | 32°F | 5.6" |
February | 25°F | 45°F | 34°F | 3.8" |
March | 37°F | 59°F | 47°F | 7.1" |
April | 47°F | 70°F | 57°F | 10.2" |
May | 56°F | 77°F | 66°F | 8.9" |
June | 65°F | 87°F | 76°F | 9.2" |
July | 68°F | 89°F | 78°F | 8.0" |
August | 66°F | 88°F | 76°F | 7.8" |
September | 58°F | 82°F | 69°F | 8.4" |
October | 47°F | 70°F | 57°F | 8.6" |
November | 36°F | 57°F | 46°F | 6.9" |
December | 28°F | 45°F | 36°F | 8.2" |
Index | Swansea | Illinois | National |
Air quality index | 54 | 41 | 42 |
Pollution index | 6,055,640 | 3,148,694 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 134 |
Days with moderate air quality | 221 |
Days w/ poor A.Q. for sensitive groups | 8 |
Days with unhealthy air quality | 2 |
Pollutant | Total |
Arsenic | 0.010% |
Benzene | 0.070% |
Carbon Tetrachloride | 0.040% |
Lead | 0.100% |
Mercury | 0.230% |
City | Population | Air Quality Index | National Avg. |
Maryville, IL | 7,962 | 54 | 8.0% |
Bellefontaine Neighbors, MO | 10,441 | 54 | 8.0% |
Millstadt, IL | 3,882 | 54 | 8.0% |
Mascoutah, IL | 8,454 | 54 | 8.0% |
East Carondelet, IL | 317 | 54 | 8.0% |
Swansea, IL | 14,100 | 54 | 8.0% |
City | Population | Air Quality Index | National Avg. |
Vail, AZ | 14,099 | 47 | 6.0% |
Willowick, OH | 14,103 | 50 | = 100 |
Auburn, CA | 14,104 | 52 | 4.0% |
Red Bluff, CA | 14,091 | 41 | 18.0% |
Lake Wylie, SC | 14,091 | 49 | 2.0% |
Swansea, IL | 14,100 | 54 | 8.0% |