| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 30°F | 51°F | 40°F | 4.0" |
| February | 31°F | 54°F | 42°F | 4.4" |
| March | 39°F | 63°F | 50°F | 4.2" |
| April | 48°F | 73°F | 60°F | 5.4" |
| May | 56°F | 79°F | 67°F | 7.6" |
| June | 65°F | 88°F | 76°F | 8.9" |
| July | 69°F | 90°F | 79°F | 6.9" |
| August | 68°F | 88°F | 77°F | 11.6" |
| September | 62°F | 82°F | 71°F | 7.0" |
| October | 50°F | 73°F | 61°F | 8.0" |
| November | 39°F | 63°F | 50°F | 6.2" |
| December | 35°F | 56°F | 44°F | 5.2" |
| Index | Warrenton | North Carolina | National |
| Air quality index | 36 | 35 | 42 |
| Pollution index | 1,869,560 | 2,789,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 363 |
| Days with good air quality | 325 |
| Days with moderate air quality | 38 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.160% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.180% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Hollister, NC | 860 | 36 | 28.0% |
| Ebony, VA | 231 | 36 | 28.0% |
| Bracey, VA | 1,113 | 36 | 28.0% |
| Littleton, NC | 520 | 36 | 28.0% |
| Centerville, NC | 302 | 36 | 28.0% |
| Warrenton, NC | 1,036 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Tumbling Shoals, AR | 1,036 | 45 | 10.0% |
| Matheny, CA | 1,036 | 66 | 32.0% |
| Thomasboro, IL | 1,036 | 42 | 16.0% |
| Piney Point, MD | 1,036 | 41 | 18.0% |
| Yeagertown, PA | 1,036 | 44 | 12.0% |
| Warrenton, NC | 1,036 | 36 | 28.0% |
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