| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 35°F | 56°F | 45°F | 6.9" |
| February | 33°F | 55°F | 43°F | 4.8" |
| March | 41°F | 67°F | 53°F | 7.5" |
| April | 47°F | 73°F | 59°F | 5.2" |
| May | 54°F | 79°F | 67°F | 2.6" |
| June | 65°F | 86°F | 75°F | 10.3" |
| July | 69°F | 89°F | 78°F | 7.2" |
| August | 71°F | 93°F | 81°F | 5.1" |
| September | 63°F | 87°F | 74°F | 3.8" |
| October | 54°F | 76°F | 64°F | 10.6" |
| November | 39°F | 66°F | 52°F | 2.9" |
| December | 35°F | 57°F | 45°F | 7.2" |
| Index | Marshville | North Carolina | National |
| Air quality index | 49 | 35 | 42 |
| Pollution index | 691,074 | 2,789,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 200 |
| Days with moderate air quality | 147 |
| Days w/ poor A.Q. for sensitive groups | 18 |
| Days with unhealthy air quality | 0 |
| 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. |
| Mount Croghan, SC | 142 | 49 | 2.0% |
| Hemby Bridge, NC | 1,853 | 49 | 2.0% |
| Wingate, NC | 4,456 | 49 | 2.0% |
| Pageland, SC | 2,556 | 49 | 2.0% |
| Monroe, NC | 35,339 | 49 | 2.0% |
| Marshville, NC | 2,748 | 49 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Tompkinsville, KY | 2,748 | 25 | 50.0% |
| Refugio, TX | 2,748 | 42 | 16.0% |
| Windsor, VA | 2,748 | 40 | 20.0% |
| Greenwich, NJ | 2,747 | 51 | 2.0% |
| Thermopolis, WY | 2,747 | 45 | 10.0% |
| Marshville, NC | 2,748 | 49 | 2.0% |
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