| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 15°F | 32°F | 23°F | 2.0" |
| February | 16°F | 34°F | 25°F | 2.7" |
| March | 31°F | 50°F | 39°F | 5.0" |
| April | 41°F | 64°F | 51°F | 6.5" |
| May | 51°F | 75°F | 62°F | 4.6" |
| June | 61°F | 83°F | 71°F | 8.9" |
| July | 64°F | 85°F | 74°F | 4.5" |
| August | 61°F | 83°F | 72°F | 4.9" |
| September | 54°F | 78°F | 65°F | 3.6" |
| October | 43°F | 64°F | 53°F | 3.1" |
| November | 32°F | 50°F | 40°F | 2.9" |
| December | 20°F | 35°F | 28°F | 4.0" |
| Index | Sabula | Iowa | National |
| Air quality index | 42 | 39 | 42 |
| Pollution index | 1,592,910 | 1,154,535 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 268 |
| Days with moderate air quality | 96 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.090% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.010% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Miles, IA | 388 | 42 | 16.0% |
| Savanna, IL | 2,924 | 42 | 16.0% |
| Spragueville, IA | 113 | 42 | 16.0% |
| Preston, IA | 1,013 | 42 | 16.0% |
| Thomson, IL | 369 | 42 | 16.0% |
| Sabula, IA | 494 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Centertown, KY | 494 | 43 | 14.0% |
| Fleming-Neon, KY | 494 | 45 | 10.0% |
| Supreme, LA | 494 | 41 | 18.0% |
| Guilford, ME | 494 | 31 | 38.0% |
| Avondale, MO | 494 | 47 | 6.0% |
| Sabula, IA | 494 | 42 | 16.0% |
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