| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 58°F | 46°F | 5.8" |
| February | 38°F | 61°F | 48°F | 6.2" |
| March | 46°F | 70°F | 57°F | 6.3" |
| April | 52°F | 78°F | 65°F | 6.7" |
| May | 60°F | 84°F | 71°F | 3.8" |
| June | 69°F | 92°F | 79°F | 5.1" |
| July | 71°F | 93°F | 81°F | 4.5" |
| August | 71°F | 93°F | 81°F | 4.8" |
| September | 65°F | 88°F | 75°F | 4.0" |
| October | 52°F | 78°F | 64°F | 3.5" |
| November | 43°F | 68°F | 54°F | 4.4" |
| December | 39°F | 61°F | 49°F | 6.1" |
| Index | Newbern | Alabama | National |
| Air quality index | 35 | 37 | 42 |
| Pollution index | 2,161,830 | 3,012,339 | 2,726,193 |
| Measurement | Total |
| Days measured | 264 |
| Days with good air quality | 240 |
| Days with moderate air quality | 24 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.990% |
| Lead | 0.020% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Marion, AL | 3,196 | 35 | 30.0% |
| Uniontown, AL | 1,918 | 35 | 30.0% |
| Faunsdale, AL | 99 | 35 | 30.0% |
| Greensboro, AL | 2,956 | 35 | 30.0% |
| Newbern, AL | 221 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Widener, AR | 221 | 45 | 10.0% |
| Jeddito, AZ | 221 | 17 | 66.0% |
| Conroy, IA | 221 | 39 | 22.0% |
| Moorhead, IA | 221 | 40 | 20.0% |
| De Witt, IL | 221 | 44 | 12.0% |
| Newbern, AL | 221 | 35 | 30.0% |
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