Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 9°F | 29°F | 19°F | 1.3" |
February | 11°F | 33°F | 22°F | 1.2" |
March | 25°F | 49°F | 36°F | 1.9" |
April | 36°F | 63°F | 49°F | 5.0" |
May | 47°F | 74°F | 60°F | 4.8" |
June | 58°F | 83°F | 71°F | 6.5" |
July | 61°F | 86°F | 74°F | 4.9" |
August | 58°F | 84°F | 71°F | 4.0" |
September | 51°F | 79°F | 64°F | 3.4" |
October | 39°F | 65°F | 51°F | 3.2" |
November | 27°F | 50°F | 38°F | 1.8" |
December | 14°F | 33°F | 23°F | 2.1" |
Index | Shell Rock | Iowa | National |
Air quality index | 39 | 39 | 42 |
Pollution index | 1,013,960 | 1,154,535 | 2,726,193 |
Measurement | Total |
Days measured | 363 |
Days with good air quality | 286 |
Days with moderate air quality | 77 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.000% |
Benzene | 0.010% |
Carbon Tetrachloride | 0.001% |
Lead | 0.001% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Greene, IA | 1,182 | 15 | 70.0% |
Allison, IA | 1,134 | 39 | 22.0% |
Janesville, IA | 1,051 | 39 | 22.0% |
Waverly, IA | 10,172 | 39 | 22.0% |
Cedar Falls, IA | 40,750 | 39 | 22.0% |
Shell Rock, IA | 1,646 | 39 | 22.0% |
City | Population | Air Quality Index | National Avg. |
Sea Breeze, NC | 1,646 | 34 | 32.0% |
Saint-Bernard-de-Lacolle, QC | 1,646 | n/a | |
Locust Fork, AL | 1,645 | 53 | 6.0% |
Hampton, AR | 1,645 | 35 | 30.0% |
Searles Valley, CA | 1,647 | 15 | 70.0% |
Shell Rock, IA | 1,646 | 39 | 22.0% |