| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 58°F | 46°F | 5.8" |
| February | 38°F | 61°F | 48°F | 6.2" |
| March | 46°F | 70°F | 57°F | 6.3" |
| April | 52°F | 78°F | 65°F | 6.7" |
| May | 60°F | 84°F | 71°F | 3.8" |
| June | 69°F | 92°F | 79°F | 5.1" |
| July | 71°F | 93°F | 81°F | 4.5" |
| August | 71°F | 93°F | 81°F | 4.8" |
| September | 65°F | 88°F | 75°F | 4.0" |
| October | 52°F | 78°F | 64°F | 3.5" |
| November | 43°F | 68°F | 54°F | 4.4" |
| December | 39°F | 61°F | 49°F | 6.1" |
| Index | Holt | Alabama | National |
| Air quality index | 35 | 37 | 42 |
| Pollution index | 660,757 | 3,012,339 | 2,726,193 |
| Measurement | Total |
| Days measured | 264 |
| Days with good air quality | 240 |
| Days with moderate air quality | 24 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.003% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Coaling, AL | 1,702 | 35 | 30.0% |
| Northport, AL | 25,970 | 35 | 30.0% |
| Cottondale, AL | 3,325 | 35 | 30.0% |
| Tuscaloosa, AL | 100,633 | 35 | 30.0% |
| Vance, AL | 1,475 | 35 | 30.0% |
| Holt, AL | 4,358 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Nashville, AR | 4,359 | 39 | 22.0% |
| Rockmart, GA | 4,359 | 44 | 12.0% |
| Château-Richer, QC | 4,359 | n/a | |
| Swannanoa, NC | 4,360 | 44 | 12.0% |
| Harbison Canyon, CA | 4,355 | 64 | 28.0% |
| Holt, AL | 4,358 | 35 | 30.0% |
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