| 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 | Clay | 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. |
| Odenville, AL | 3,705 | 38 | 24.0% |
| Highland Lake, AL | 396 | 43 | 14.0% |
| Allgood, AL | 796 | 43 | 14.0% |
| Gardendale, AL | 14,021 | 53 | 6.0% |
| Warrior, AL | 3,197 | 53 | 6.0% |
| Clay, AL | 9,936 | 53 | 6.0% |
| City | Population | Air Quality Index | National Avg. |
| Box Elder, SD | 9,937 | 44 | 12.0% |
| Gages Lake, IL | 9,939 | 39 | 22.0% |
| Queens, NS | 9,932 | n/a | |
| Fort Salonga, NY | 9,930 | 43 | 14.0% |
| Astoria, OR | 9,929 | 18 | 64.0% |
| Clay, AL | 9,936 | 53 | 6.0% |
Here are the best places to live in Alabama
10 Best cities in Alabama for employment
These are the 10 most affordable cities in Alabama
Check out the 10 safest cities in Alabama