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 | Westwood | Des Moines | Iowa |
Air quality index | 39 | 39 | 39 |
Pollution index | 9,310,160 | 9,310,160 | 1,154,535 |
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. |
Altoona, IA | 18,917 | 39 | 22.0% |
Pleasant Hill, IA | 9,959 | 39 | 22.0% |
West Des Moines, IA | 66,724 | 39 | 22.0% |
Elkhart, IA | 695 | 39 | 22.0% |
Dallas Center, IA | 1,710 | 39 | 22.0% |
Des Moines, IA | 215,408 | 39 | 22.0% |
City | Population | Air Quality Index | National Avg. |
Richmond Hill, ON | 215,407 | n/a | |
Tacoma, WA | 215,766 | 18 | 64.0% |
Enterprise, NV | 214,591 | 54 | 8.0% |
Modesto, CA | 214,485 | 49 | 2.0% |
San Bernardino, CA | 216,784 | 89 | 78.0% |
Des Moines, IA | 215,408 | 39 | 22.0% |