| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 53°F | 41°F | 9.4" |
| February | 33°F | 56°F | 43°F | 5.5" |
| March | 40°F | 64°F | 51°F | 3.8" |
| April | 48°F | 74°F | 61°F | 8.9" |
| May | 56°F | 79°F | 67°F | 8.5" |
| June | 65°F | 87°F | 76°F | 7.1" |
| July | 68°F | 89°F | 77°F | 8.9" |
| August | 68°F | 87°F | 77°F | 5.2" |
| September | 62°F | 82°F | 71°F | 7.1" |
| October | 49°F | 73°F | 60°F | 9.3" |
| November | 39°F | 63°F | 50°F | 10.8" |
| December | 36°F | 56°F | 45°F | 9.2" |
| Index | Ruth | North Carolina | National |
| Air quality index | 36 | 35 | 42 |
| Pollution index | 3,495,600 | 2,789,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 246 |
| Days with good air quality | 231 |
| Days with moderate air quality | 15 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.080% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.060% |
| Mercury | 0.040% |
| City | Population | Air Quality Index | National Avg. |
| Caroleen, NC | 447 | 36 | 28.0% |
| Mooresboro, NC | 220 | 36 | 28.0% |
| Rutherfordton, NC | 4,071 | 36 | 28.0% |
| Cliffside, NC | 707 | 36 | 28.0% |
| Spindale, NC | 4,193 | 36 | 28.0% |
| Ruth, NC | 629 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Pinckard, AL | 629 | 35 | 30.0% |
| Hosford, FL | 629 | 40 | 20.0% |
| La Paz, IN | 629 | 42 | 16.0% |
| Oldenburg, IN | 629 | 6 | 88.0% |
| Ellerslie, MD | 629 | 36 | 28.0% |
| Ruth, NC | 629 | 36 | 28.0% |
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