| 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 | Westover | Alabama | National |
| Air quality index | 50 | 37 | 50 |
| Pollution index | 2,562,360 | 4,051,223 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 186 |
| Days with moderate air quality | 178 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.005% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.030% |
| Mercury | 0.040% |
| City, State | Population | Air Quality Index | National Avg. |
| Bon Air, AL | 104 | 38 | 24% |
| Wilsonville, AL | 2,119 | 38 | 24% |
| Oak Grove, AL | 562 | 38 | 24% |
| Harpersville, AL | 1,760 | 38 | 24% |
| Pell City, AL | 13,489 | 38 | 24% |
| Westover, AL | 1,315 | 50 | = 100 |
| City, State | Population | Air Quality Index | National Avg. |
| Tariffville, CT | 1,315 | 46 | 8% |
| Monroeville, OH | 1,315 | 36 | 28% |
| Hawi, HI | 1,315 | 28 | 44% |
| Durand, IL | 1,315 | 31 | 38% |
| Cottonwood, AL | 1,316 | 33 | 34% |
| Westover, AL | 1,315 | 50 | = 100 |
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