| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 35°F | 56°F | 45°F | 5.0" |
| February | 38°F | 59°F | 47°F | 5.3" |
| March | 46°F | 69°F | 56°F | 5.6" |
| April | 53°F | 77°F | 65°F | 5.9" |
| May | 61°F | 82°F | 71°F | 4.9" |
| June | 70°F | 90°F | 79°F | 4.6" |
| July | 72°F | 91°F | 81°F | 6.2" |
| August | 72°F | 91°F | 80°F | 5.0" |
| September | 66°F | 86°F | 75°F | 4.0" |
| October | 54°F | 77°F | 64°F | 3.3" |
| November | 43°F | 67°F | 54°F | 3.6" |
| December | 39°F | 58°F | 48°F | 5.7" |
| Index | McDonald Chapel | Alabama | National |
| Air quality index | 53 | 37 | 42 |
| Pollution index | 18,988,200 | 3,012,339 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 150 |
| Days with moderate air quality | 197 |
| Days w/ poor A.Q. for sensitive groups | 18 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.570% |
| Benzene | 0.220% |
| Carbon Tetrachloride | 0.040% |
| Lead | 1.020% |
| Mercury | 1.230% |
| City | Population | Air Quality Index | National Avg. |
| Fairfield, AL | 10,749 | 53 | 6.0% |
| Homewood, AL | 25,170 | 53 | 6.0% |
| Mount Olive CDP (Coosa County), AL | 275 | 53 | 6.0% |
| Center Point, AL | 15,971 | 53 | 6.0% |
| Mountain Brook, AL | 20,178 | 53 | 6.0% |
| McDonald Chapel, AL | 662 | 53 | 6.0% |
| City | Population | Air Quality Index | National Avg. |
| Bluford, IL | 662 | 43 | 14.0% |
| Millington, IL | 662 | 0 | 100.0% |
| Fairland, IN | 662 | 54 | 8.0% |
| Elgin, ND | 662 | 33 | 34.0% |
| Bayview, TX | 662 | 44 | 12.0% |
| McDonald Chapel, AL | 662 | 53 | 6.0% |
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