| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 29°F | 52°F | 40°F | 2.4" |
| February | 31°F | 55°F | 42°F | 2.4" |
| March | 39°F | 65°F | 51°F | 3.4" |
| April | 48°F | 74°F | 61°F | 3.8" |
| May | 56°F | 80°F | 68°F | 3.5" |
| June | 64°F | 88°F | 76°F | 4.3" |
| July | 68°F | 90°F | 78°F | 4.4" |
| August | 67°F | 89°F | 77°F | 2.9" |
| September | 61°F | 83°F | 71°F | 4.5" |
| October | 48°F | 73°F | 60°F | 3.0" |
| November | 37°F | 63°F | 49°F | 3.1" |
| December | 34°F | 56°F | 44°F | 3.4" |
| Index | Liberty | North Carolina | National |
| Air quality index | 31 | 35 | 42 |
| Pollution index | 16,424,300 | 2,789,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 356 |
| Days with good air quality | 313 |
| Days with moderate air quality | 43 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.130% |
| Carbon Tetrachloride | 0.040% |
| Lead | 0.030% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Siler City, NC | 8,159 | 29 | 42.0% |
| Ramseur, NC | 2,048 | 31 | 38.0% |
| Graham, NC | 15,168 | 31 | 38.0% |
| Saxapahaw, NC | 1,340 | 31 | 38.0% |
| Swepsonville, NC | 2,254 | 31 | 38.0% |
| Liberty, NC | 2,657 | 31 | 38.0% |
| City | Population | Air Quality Index | National Avg. |
| Rancho Santa Fe, CA | 2,657 | 64 | 28.0% |
| New Boston, OH | 2,657 | 14 | 72.0% |
| Lexington Hills, CA | 2,656 | 35 | 30.0% |
| La Mesilla, NM | 2,656 | 41 | 18.0% |
| Gastonville, PA | 2,656 | 56 | 12.0% |
| Liberty, NC | 2,657 | 31 | 38.0% |
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