| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 51°F | 40°F | 4.0" |
| February | 33°F | 54°F | 42°F | 4.4" |
| March | 40°F | 63°F | 50°F | 4.2" |
| April | 49°F | 72°F | 60°F | 4.4" |
| May | 56°F | 78°F | 66°F | 5.9" |
| June | 64°F | 86°F | 74°F | 7.1" |
| July | 68°F | 88°F | 77°F | 6.0" |
| August | 67°F | 87°F | 76°F | 5.8" |
| September | 61°F | 81°F | 70°F | 7.5" |
| October | 50°F | 71°F | 59°F | 4.6" |
| November | 39°F | 61°F | 49°F | 6.9" |
| December | 35°F | 54°F | 44°F | 6.3" |
| Index | Louisburg | North Carolina | National |
| Air quality index | 46 | 35 | 42 |
| Pollution index | 2,959,880 | 2,789,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 239 |
| Days with moderate air quality | 126 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Spring Hope, NC | 1,506 | 36 | 28.0% |
| Castalia, NC | 282 | 36 | 28.0% |
| Centerville, NC | 311 | 36 | 28.0% |
| Lake Royale, NC | 3,304 | 36 | 28.0% |
| Momeyer, NC | 443 | 36 | 28.0% |
| Louisburg, NC | 3,778 | 46 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Hamilton, NY | 3,778 | 27 | 46.0% |
| Zelienople, PA | 3,778 | 31 | 38.0% |
| Turners Falls, MA | 3,779 | 34 | 32.0% |
| Columbus, TX | 3,776 | 31 | 38.0% |
| Channel-Port aux Basques, NL | 3,776 | n/a | |
| Louisburg, NC | 3,778 | 46 | 8.0% |