| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 33°F | 54°F | 42°F | 4.8" |
| February | 35°F | 57°F | 45°F | 3.2" |
| March | 44°F | 67°F | 54°F | 4.5" |
| April | 51°F | 76°F | 63°F | 4.9" |
| May | 59°F | 82°F | 70°F | 4.3" |
| June | 67°F | 91°F | 78°F | 4.2" |
| July | 70°F | 92°F | 80°F | 5.3" |
| August | 69°F | 92°F | 79°F | 4.5" |
| September | 62°F | 86°F | 73°F | 3.8" |
| October | 50°F | 76°F | 62°F | 3.9" |
| November | 40°F | 65°F | 52°F | 3.6" |
| December | 36°F | 56°F | 45°F | 5.6" |
| Index | Sheffield | Alabama | National |
| Air quality index | 37 | 37 | 42 |
| Pollution index | 321,318 | 3,012,339 | 2,726,193 |
| Measurement | Total |
| Days measured | 263 |
| Days with good air quality | 252 |
| Days with moderate air quality | 11 |
| 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. |
| Cherokee, AL | 876 | 37 | 26.0% |
| Muscle Shoals, AL | 14,379 | 37 | 26.0% |
| Killen, AL | 1,146 | 37 | 26.0% |
| St. Florian, AL | 506 | 37 | 26.0% |
| Leighton, AL | 789 | 37 | 26.0% |
| Sheffield, AL | 8,925 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Pineville, NC | 8,923 | 49 | 2.0% |
| Sturgeon Bay, WI | 8,927 | 36 | 28.0% |
| Shawano, WI | 8,928 | 36 | 28.0% |
| Ivins, UT | 8,931 | 44 | 12.0% |
| Alma, MI | 8,918 | 26 | 48.0% |
| Sheffield, AL | 8,925 | 37 | 26.0% |
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