| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 34°F | 57°F | 44°F | 5.0" |
| February | 36°F | 60°F | 47°F | 4.7" |
| March | 44°F | 69°F | 55°F | 5.5" |
| April | 51°F | 77°F | 63°F | 4.9" |
| May | 59°F | 82°F | 70°F | 4.6" |
| June | 67°F | 90°F | 77°F | 3.3" |
| July | 70°F | 91°F | 79°F | 5.0" |
| August | 70°F | 91°F | 79°F | 4.5" |
| September | 64°F | 86°F | 74°F | 2.5" |
| October | 52°F | 76°F | 63°F | 3.6" |
| November | 41°F | 66°F | 52°F | 3.7" |
| December | 38°F | 59°F | 47°F | 5.4" |
| Index | Delta | Alabama | National |
| Air quality index | 38 | 37 | 50 |
| Pollution index | 5,453,470 | 4,051,223 | 5,066,862 |
| Measurement | Total |
| Days measured | 114 |
| Days with good air quality | 88 |
| Days with moderate air quality | 26 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.004% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.280% |
| Mercury | 0.002% |
| City, State | Population | Air Quality Index | National Avg. |
| Oxford, AL | 21,202 | 38 | 24% |
| Morrison Crossroads, AL | 302 | 38 | 24% |
| Heflin, AL | 3,489 | 38 | 24% |
| West End-Cobb Town, AL | 3,550 | 38 | 24% |
| Wedowee, AL | 742 | 38 | 24% |
| Delta, AL | 260 | 38 | 24% |
| City, State | Population | Air Quality Index | National Avg. |
| Benjamin, TX | 260 | 26 | 48% |
| Riverton, IA | 260 | 40 | 20% |
| Union, AL | 260 | 35 | 30% |
| Worley, ID | 260 | 43 | 14% |
| Philo, CA | 260 | 33 | 34% |
| Delta, AL | 260 | 38 | 24% |
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