Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 12°F | 29°F | 20°F | 0.8" |
February | 14°F | 32°F | 23°F | 1.0" |
March | 28°F | 48°F | 37°F | 2.1" |
April | 39°F | 63°F | 50°F | 4.6" |
May | 50°F | 73°F | 61°F | 3.9" |
June | 60°F | 81°F | 70°F | 7.0" |
July | 63°F | 84°F | 73°F | 4.8" |
August | 61°F | 82°F | 71°F | 4.7" |
September | 53°F | 76°F | 64°F | 4.0" |
October | 42°F | 63°F | 52°F | 3.1" |
November | 29°F | 49°F | 38°F | 2.1" |
December | 17°F | 33°F | 25°F | 1.9" |
Index | Mount Vernon | Iowa | National |
Air quality index | 39 | 39 | 42 |
Pollution index | 5,075,380 | 1,154,535 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 287 |
Days with moderate air quality | 78 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.070% |
Benzene | 0.050% |
Carbon Tetrachloride | 2.000% |
Lead | 0.040% |
Mercury | 0.100% |
City | Population | Air Quality Index | National Avg. |
North Liberty, IA | 19,159 | 35 | 30.0% |
Tiffin, IA | 3,779 | 35 | 30.0% |
Solon, IA | 2,690 | 35 | 30.0% |
Stanwood, IA | 673 | 35 | 30.0% |
Ely, IA | 2,224 | 39 | 22.0% |
Mount Vernon, IA | 4,487 | 39 | 22.0% |
City | Population | Air Quality Index | National Avg. |
La Vale, MD | 4,486 | 36 | 28.0% |
Battleford, SK | 4,486 | n/a | |
Denton, MD | 4,488 | 36 | 28.0% |
Ottawa Hills, OH | 4,485 | 40 | 20.0% |
Ligonier, IN | 4,489 | 37 | 26.0% |
Mount Vernon, IA | 4,487 | 39 | 22.0% |