| 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 | Mountain Brook | 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. |
| Birmingham, AL | 210,928 | 53 | 6.0% |
| Fultondale, AL | 9,247 | 53 | 6.0% |
| Hoover, AL | 85,386 | 53 | 6.0% |
| Mount Olive, AL | 4,052 | 53 | 6.0% |
| Dunnavant, AL | 1,150 | 53 | 6.0% |
| Mountain Brook, AL | 20,178 | 53 | 6.0% |
| City | Population | Air Quality Index | National Avg. |
| Payson, UT | 20,181 | 46 | 8.0% |
| Nogales, AZ | 20,182 | 31 | 38.0% |
| Kinston, NC | 20,173 | 42 | 16.0% |
| La Crescenta-Montrose, CA | 20,171 | 72 | 44.0% |
| Kirkland, QC | 20,189 | n/a | |
| Mountain Brook, AL | 20,178 | 53 | 6.0% |
Here are the best places to live in Alabama
These are the largest cities in Alabama
These are the 10 cheapest cities in Alabama
Check out the 10 safest cities in Alabama