| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 20°F | 34°F | 26°F | 2.9" |
| February | 27°F | 47°F | 36°F | 2.2" |
| March | 35°F | 56°F | 44°F | 8.3" |
| April | 45°F | 65°F | 54°F | 4.8" |
| May | 51°F | 73°F | 61°F | 6.4" |
| June | 63°F | 87°F | 75°F | 4.8" |
| July | 67°F | 88°F | 77°F | 8.0" |
| August | 62°F | 84°F | 72°F | 5.8" |
| September | 58°F | 81°F | 69°F | 9.2" |
| October | 46°F | 69°F | 56°F | 8.5" |
| November | 35°F | 56°F | 45°F | 4.1" |
| December | 21°F | 36°F | 28°F | 2.6" |
| Index | Lorimor | Iowa | National |
| Air quality index | 39 | 39 | 42 |
| Pollution index | 376,148 | 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 | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| St. Charles, IA | 787 | 39 | 22.0% |
| Thayer, IA | 24 | 39 | 22.0% |
| Afton, IA | 901 | 39 | 22.0% |
| Macksburg, IA | 97 | 39 | 22.0% |
| Arispe, IA | 103 | 39 | 22.0% |
| Lorimor, IA | 396 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| South Van Horn, AK | 396 | 38 | 24.0% |
| Highland Lake, AL | 396 | 43 | 14.0% |
| Blevins, AR | 396 | 32 | 36.0% |
| Wausau, FL | 396 | 38 | 24.0% |
| Bedford, KY | 396 | 49 | 2.0% |
| Lorimor, IA | 396 | 39 | 22.0% |
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