| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 11°F | 29°F | 19°F | 0.5" |
| February | 15°F | 32°F | 22°F | 3.0" |
| March | 29°F | 50°F | 37°F | 2.2" |
| April | 39°F | 63°F | 50°F | 7.2" |
| May | 51°F | 74°F | 61°F | 8.1" |
| June | 62°F | 84°F | 72°F | 8.2" |
| July | 64°F | 87°F | 75°F | 9.1" |
| August | 63°F | 83°F | 72°F | 17.3" |
| September | 56°F | 81°F | 66°F | 7.3" |
| October | 44°F | 68°F | 53°F | 4.4" |
| November | 29°F | 51°F | 37°F | 4.8" |
| December | 12°F | 27°F | 19°F | 3.9" |
| Index | Irvington | Iowa | National |
| Air quality index | 15 | 39 | 42 |
| Pollution index | 426,616 | 1,154,535 | 2,726,193 |
| Measurement | Total |
| Days measured | 118 |
| Days with good air quality | 118 |
| Days with moderate air quality | 0 |
| 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. |
| Lone Rock, IA | 179 | 15 | 70.0% |
| Whittemore, IA | 576 | 15 | 70.0% |
| Bode, IA | 350 | 15 | 70.0% |
| Livermore, IA | 434 | 15 | 70.0% |
| Algona, IA | 5,415 | 15 | 70.0% |
| Irvington, IA | 41 | 15 | 70.0% |
| City | Population | Air Quality Index | National Avg. |
| Tatitlek, AK | 41 | 31 | 38.0% |
| Tinsman, AR | 41 | 35 | 30.0% |
| Two Buttes, CO | 41 | 20 | 60.0% |
| Conway, IA | 41 | 43 | 14.0% |
| Rathbun, IA | 41 | 39 | 22.0% |
| Irvington, IA | 41 | 15 | 70.0% |
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