| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 41°F | 63°F | 51°F | 7.2" |
| February | 41°F | 64°F | 51°F | 5.2" |
| March | 46°F | 73°F | 59°F | 5.0" |
| April | 51°F | 76°F | 62°F | 11.2" |
| May | 58°F | 85°F | 71°F | 1.0" |
| June | 68°F | 90°F | 78°F | 8.1" |
| July | 72°F | 90°F | 79°F | 7.9" |
| August | 73°F | 94°F | 81°F | 6.8" |
| September | 67°F | 89°F | 76°F | 9.0" |
| October | 55°F | 78°F | 65°F | 5.0" |
| November | 45°F | 71°F | 57°F | 6.2" |
| December | 39°F | 64°F | 50°F | 8.5" |
| Index | Megargel | Alabama | National |
| Air quality index | 37 | 37 | 42 |
| Pollution index | 2,726,750 | 3,012,339 | 2,726,193 |
| Measurement | Total |
| Days measured | 271 |
| Days with good air quality | 237 |
| Days with moderate air quality | 34 |
| 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 | 0.001% |
| Lead | 0.002% |
| Mercury | 0.070% |
| City | Population | Air Quality Index | National Avg. |
| Excel, AL | 864 | 37 | 26.0% |
| Uriah, AL | 401 | 37 | 26.0% |
| Frisco City, AL | 1,786 | 37 | 26.0% |
| Repton, AL | 440 | 37 | 26.0% |
| Monroeville, AL | 5,812 | 37 | 26.0% |
| Megargel, AL | 20 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Lake Minchumina, AK | 20 | 38 | 24.0% |
| Tonsina, AK | 20 | 31 | 38.0% |
| Hunter Creek, AZ | 20 | 60 | 20.0% |
| Salmon Creek, CA | 20 | 34 | 32.0% |
| Burchinal, IA | 20 | 15 | 70.0% |
| Megargel, AL | 20 | 37 | 26.0% |
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