| 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 | 1,459 | 36 | 28.0% |
| Castalia, NC | 276 | 36 | 28.0% |
| Centerville, NC | 302 | 36 | 28.0% |
| Lake Royale, NC | 3,228 | 36 | 28.0% |
| Momeyer, NC | 430 | 36 | 28.0% |
| Louisburg, NC | 3,694 | 46 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Zelienople, PA | 3,694 | 31 | 38.0% |
| Mountain Green, UT | 3,694 | 45 | 10.0% |
| Tupper Lake, NY | 3,692 | 0 | 100.0% |
| Emerald Isle, NC | 3,691 | 37 | 26.0% |
| Meiners Oaks, CA | 3,697 | 46 | 8.0% |
| Louisburg, NC | 3,694 | 46 | 8.0% |
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