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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 58°F | 47°F | 4.9" |
| February | 34°F | 57°F | 45°F | 3.9" |
| March | 41°F | 69°F | 54°F | 4.7" |
| April | 49°F | 75°F | 62°F | 6.3" |
| May | 57°F | 81°F | 69°F | 2.1" |
| June | 67°F | 88°F | 77°F | 7.2" |
| July | 71°F | 92°F | 81°F | 8.0" |
| August | 72°F | 94°F | 82°F | 6.6" |
| September | 66°F | 88°F | 76°F | 5.3" |
| October | 57°F | 78°F | 67°F | 8.8" |
| November | 42°F | 67°F | 54°F | 3.8" |
| December | 37°F | 59°F | 47°F | 5.5" |
| Index | Rex | North Carolina | National |
| Air quality index | 30 | 35 | 42 |
| Pollution index | 940,521 | 2,789,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 117 |
| Days with good air quality | 101 |
| Days with moderate air quality | 16 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Barker Ten Mile, NC | 955 | 30 | 40.0% |
| Tar Heel, NC | 122 | 30 | 40.0% |
| Pembroke, NC | 2,997 | 30 | 40.0% |
| Shannon, NC | 348 | 30 | 40.0% |
| Rennert, NC | 400 | 30 | 40.0% |
| Rex, NC | 56 | 30 | 40.0% |
| City | Population | Air Quality Index | National Avg. |
| Hughes, AK | 56 | 38 | 24.0% |
| Northway Junction, AK | 56 | 38 | 24.0% |
| Shageluk, AK | 56 | 31 | 38.0% |
| Beedeville, AR | 56 | 45 | 10.0% |
| Aspen Springs, CA | 56 | 47 | 6.0% |
| Rex, NC | 56 | 30 | 40.0% |
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