| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 13°F | 30°F | 21°F | 3.8" |
| February | 13°F | 30°F | 21°F | 3.4" |
| March | 22°F | 40°F | 31°F | 3.2" |
| April | 35°F | 56°F | 45°F | 5.2" |
| May | 47°F | 69°F | 58°F | 5.4" |
| June | 55°F | 75°F | 65°F | 6.7" |
| July | 60°F | 80°F | 70°F | 5.8" |
| August | 59°F | 79°F | 68°F | 7.6" |
| September | 51°F | 73°F | 61°F | 5.7" |
| October | 41°F | 60°F | 50°F | 7.5" |
| November | 30°F | 47°F | 38°F | 4.4" |
| December | 20°F | 35°F | 27°F | 4.0" |
| Index | Carthage | New York | National |
| Air quality index | 35 | 43 | 42 |
| Pollution index | 230,538 | 6,179,275 | 2,726,193 |
| Measurement | Total |
| Days measured | 205 |
| Days with good air quality | 198 |
| Days with moderate air quality | 7 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.004% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Calcium, NY | 3,548 | 35 | 30.0% |
| Deferiet, NY | 282 | 35 | 30.0% |
| Pamelia Center, NY | 441 | 35 | 30.0% |
| Harrisville, NY | 620 | 35 | 30.0% |
| West Carthage, NY | 1,496 | 35 | 30.0% |
| Carthage, NY | 3,364 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Shannondale, WV | 3,364 | 38 | 24.0% |
| Saint-Thomas, QC | 3,364 | n/a | |
| Corunna, MI | 3,363 | 38 | 24.0% |
| Heyburn, ID | 3,365 | 20 | 60.0% |
| Westway, TX | 3,365 | 53 | 6.0% |
| Carthage, NY | 3,364 | 35 | 30.0% |
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