Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 14°F | 35°F | 23°F | 0.9" |
February | 17°F | 39°F | 26°F | 1.2" |
March | 30°F | 54°F | 41°F | 2.2" |
April | 41°F | 67°F | 53°F | 4.9" |
May | 51°F | 76°F | 63°F | 4.9" |
June | 62°F | 86°F | 74°F | 6.5" |
July | 66°F | 89°F | 77°F | 4.2" |
August | 64°F | 87°F | 75°F | 5.1" |
September | 56°F | 81°F | 68°F | 3.7" |
October | 43°F | 68°F | 55°F | 3.2" |
November | 31°F | 54°F | 42°F | 1.8" |
December | 18°F | 38°F | 27°F | 2.1" |
Index | Swan | Iowa | National |
Air quality index | 39 | 39 | 42 |
Pollution index | 9,310,160 | 1,154,535 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 306 |
Days with moderate air quality | 59 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.010% |
Benzene | 0.110% |
Carbon Tetrachloride | 0.080% |
Lead | 0.030% |
Mercury | 0.010% |
City | Population | Air Quality Index | National Avg. |
Mitchellville, IA | 2,382 | 39 | 22.0% |
Monroe, IA | 1,810 | 39 | 22.0% |
Indianola, IA | 15,921 | 39 | 22.0% |
Ackworth, IA | 212 | 39 | 22.0% |
Altoona, IA | 18,917 | 39 | 22.0% |
Swan, IA | 46 | 39 | 22.0% |
City | Population | Air Quality Index | National Avg. |
Tolsona, AK | 46 | 31 | 38.0% |
Cardiff, AL | 46 | 53 | 6.0% |
Soda Springs, CA | 46 | 44 | 12.0% |
Morley, IA | 46 | 39 | 22.0% |
Redding, IA | 46 | 43 | 14.0% |
Swan, IA | 46 | 39 | 22.0% |