| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 34°F | 54°F | 43°F | 5.9" |
| February | 36°F | 59°F | 46°F | 5.5" |
| March | 43°F | 67°F | 54°F | 5.3" |
| April | 52°F | 76°F | 63°F | 6.6" |
| May | 60°F | 83°F | 71°F | 7.1" |
| June | 67°F | 91°F | 78°F | 7.7" |
| July | 71°F | 91°F | 80°F | 5.5" |
| August | 70°F | 90°F | 79°F | 7.1" |
| September | 64°F | 85°F | 74°F | 10.4" |
| October | 52°F | 75°F | 63°F | 8.3" |
| November | 41°F | 64°F | 52°F | 8.4" |
| December | 38°F | 59°F | 47°F | 7.7" |
| Index | Old Hundred | North Carolina | National |
| Air quality index | 30 | 35 | 42 |
| Pollution index | 691,074 | 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. |
| Laurel Hill, NC | 1,117 | 30 | 40.0% |
| Tatum, SC | 276 | 30 | 40.0% |
| Hamlet, NC | 6,366 | 30 | 40.0% |
| Maxton, NC | 2,614 | 30 | 40.0% |
| East Laurinburg, NC | 345 | 30 | 40.0% |
| Old Hundred, NC | 545 | 30 | 40.0% |
| City | Population | Air Quality Index | National Avg. |
| Kachemak, AK | 545 | 31 | 38.0% |
| Lafayette, MN | 545 | 46 | 8.0% |
| Sabin, MN | 545 | 33 | 34.0% |
| Trimble, MO | 545 | 43 | 14.0% |
| Berthold, ND | 545 | 34 | 32.0% |
| Old Hundred, NC | 545 | 30 | 40.0% |
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