| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 15°F | 33°F | 22°F | 2.3" |
| February | 20°F | 39°F | 28°F | 3.1" |
| March | 34°F | 58°F | 44°F | 4.4" |
| April | 42°F | 65°F | 52°F | 10.1" |
| May | 55°F | 77°F | 65°F | 14.1" |
| June | 64°F | 85°F | 73°F | 6.4" |
| July | 67°F | 90°F | 78°F | 4.8" |
| August | 67°F | 87°F | 76°F | 9.9" |
| September | 58°F | 82°F | 68°F | 6.9" |
| October | 46°F | 69°F | 56°F | 8.1" |
| November | 31°F | 54°F | 40°F | 1.8" |
| December | 16°F | 34°F | 24°F | 2.8" |
| Index | Elliott | Iowa | National |
| Air quality index | 40 | 39 | 42 |
| Pollution index | 338,773 | 1,154,535 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 283 |
| Days with moderate air quality | 82 |
| 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 | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Griswold, IA | 1,179 | 40 | 20.0% |
| Nodaway, IA | 55 | 40 | 20.0% |
| Henderson, IA | 213 | 40 | 20.0% |
| Lewis, IA | 513 | 40 | 20.0% |
| Red Oak, IA | 5,323 | 40 | 20.0% |
| Elliott, IA | 539 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Michigantown, IN | 539 | 42 | 16.0% |
| Upton, KY | 539 | 39 | 22.0% |
| Beaver Creek, MD | 539 | 40 | 20.0% |
| Republic, MI | 539 | 8 | 84.0% |
| Emily, MN | 539 | 29 | 42.0% |
| Elliott, IA | 539 | 40 | 20.0% |
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