| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 43°F | 63°F | 52°F | 10.7" |
| February | 43°F | 64°F | 52°F | 7.8" |
| March | 49°F | 73°F | 60°F | 12.4" |
| April | 52°F | 75°F | 63°F | 16.3" |
| May | 61°F | 85°F | 73°F | 4.1" |
| June | 70°F | 90°F | 79°F | 9.3" |
| July | 73°F | 90°F | 80°F | 10.2" |
| August | 74°F | 93°F | 81°F | 12.4" |
| September | 69°F | 89°F | 78°F | 9.6" |
| October | 58°F | 80°F | 68°F | 8.7" |
| November | 48°F | 71°F | 58°F | 13.2" |
| December | 42°F | 63°F | 51°F | 10.5" |
| Index | Hartford | Alabama | National |
| Air quality index | 35 | 37 | 42 |
| Pollution index | 1,136,440 | 3,012,339 | 2,726,193 |
| Measurement | Total |
| Days measured | 280 |
| Days with good air quality | 256 |
| Days with moderate air quality | 24 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Noma, FL | 297 | 35 | 30.0% |
| Level Plains, AL | 1,781 | 35 | 30.0% |
| Midland City, AL | 1,942 | 35 | 30.0% |
| Taylor, AL | 2,742 | 35 | 30.0% |
| Black, AL | 468 | 35 | 30.0% |
| Hartford, AL | 2,584 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Dulce, NM | 2,584 | 44 | 12.0% |
| Rugby, ND | 2,583 | 36 | 28.0% |
| Swedesboro, NJ | 2,583 | 51 | 2.0% |
| Mountain View CDP, CA | 2,585 | 43 | 14.0% |
| Sterling, KS | 2,585 | 40 | 20.0% |
| Hartford, AL | 2,584 | 35 | 30.0% |
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