| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 33°F | 56°F | 43°F | 2.6" |
| February | 34°F | 59°F | 46°F | 2.9" |
| March | 41°F | 67°F | 54°F | 3.0" |
| April | 50°F | 76°F | 63°F | 2.9" |
| May | 58°F | 83°F | 70°F | 3.6" |
| June | 67°F | 90°F | 78°F | 4.8" |
| July | 70°F | 92°F | 80°F | 4.2" |
| August | 69°F | 91°F | 79°F | 3.6" |
| September | 63°F | 85°F | 73°F | 5.3" |
| October | 50°F | 76°F | 62°F | 2.7" |
| November | 40°F | 66°F | 52°F | 3.1" |
| December | 37°F | 60°F | 47°F | 3.3" |
| Index | Shannon | 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. |
| Rennert, NC | 400 | 30 | 40.0% |
| Pembroke, NC | 2,997 | 30 | 40.0% |
| Rex, NC | 56 | 30 | 40.0% |
| Prospect, NC | 810 | 30 | 40.0% |
| Barker Ten Mile, NC | 955 | 30 | 40.0% |
| Shannon, NC | 348 | 30 | 40.0% |
| City | Population | Air Quality Index | National Avg. |
| Donaldson, AR | 348 | 32 | 36.0% |
| Okolona, AR | 348 | 32 | 36.0% |
| Trinidad, CA | 348 | 27 | 46.0% |
| Buckner, IL | 348 | 43 | 14.0% |
| Snow Lake Shores, MS | 348 | 45 | 10.0% |
| Shannon, NC | 348 | 30 | 40.0% |
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