| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 29°F | 51°F | 39°F | 3.2" |
| February | 30°F | 54°F | 41°F | 2.3" |
| March | 38°F | 63°F | 50°F | 3.4" |
| April | 46°F | 73°F | 59°F | 3.6" |
| May | 54°F | 79°F | 66°F | 4.5" |
| June | 63°F | 87°F | 75°F | 4.2" |
| July | 68°F | 90°F | 78°F | 5.2" |
| August | 67°F | 89°F | 77°F | 3.7" |
| September | 60°F | 83°F | 70°F | 4.0" |
| October | 48°F | 73°F | 59°F | 3.5" |
| November | 36°F | 63°F | 48°F | 3.8" |
| December | 32°F | 54°F | 42°F | 3.6" |
| Index | Halifax | Virginia | National |
| Air quality index | 26 | 58 | 42 |
| Pollution index | 357,964 | 1,561,881 | 2,726,193 |
| Measurement | Total |
| Days measured | 108 |
| Days with good air quality | 107 |
| Days with moderate air quality | 1 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Scottsburg, VA | 112 | 26 | 48.0% |
| Mountain Road, VA | 938 | 26 | 48.0% |
| South Boston, VA | 7,676 | 26 | 48.0% |
| Nathalie, VA | 50 | 26 | 48.0% |
| Clover, VA | 536 | 26 | 48.0% |
| Halifax, VA | 1,545 | 26 | 48.0% |
| City | Population | Air Quality Index | National Avg. |
| Foresthill, CA | 1,545 | 44 | 12.0% |
| Mount Airy, GA | 1,545 | 37 | 26.0% |
| Humber Arm South, NL | 1,545 | n/a | |
| Logan, IA | 1,544 | 40 | 20.0% |
| Medicine Lodge, KS | 1,546 | 40 | 20.0% |
| Halifax, VA | 1,545 | 26 | 48.0% |
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