| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 35°F | 25°F | 2.3" |
| February | 16°F | 37°F | 26°F | 2.6" |
| March | 25°F | 47°F | 35°F | 2.9" |
| April | 36°F | 62°F | 49°F | 3.1" |
| May | 47°F | 73°F | 60°F | 3.8" |
| June | 57°F | 81°F | 68°F | 5.2" |
| July | 62°F | 85°F | 73°F | 5.4" |
| August | 59°F | 83°F | 71°F | 4.4" |
| September | 53°F | 77°F | 64°F | 3.8" |
| October | 42°F | 64°F | 52°F | 4.9" |
| November | 31°F | 52°F | 41°F | 2.6" |
| December | 22°F | 40°F | 31°F | 3.7" |
| Index | Canajoharie | New York | National |
| Air quality index | 27 | 43 | 42 |
| Pollution index | 1,674,650 | 6,179,275 | 2,726,193 |
| Measurement | Total |
| Days measured | 359 |
| Days with good air quality | 349 |
| Days with moderate air quality | 10 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.005% |
| Lead | 0.004% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Ames, NY | 177 | 27 | 46.0% |
| Nelliston, NY | 691 | 27 | 46.0% |
| Palatine Bridge, NY | 732 | 27 | 46.0% |
| Little Falls, NY | 4,673 | 27 | 46.0% |
| Cherry Valley, NY | 586 | 27 | 46.0% |
| Canajoharie, NY | 1,571 | 27 | 46.0% |
| City | Population | Air Quality Index | National Avg. |
| Loma, CO | 1,571 | 44 | 12.0% |
| Aragon, GA | 1,571 | 44 | 12.0% |
| Cardington, OH | 1,571 | 41 | 18.0% |
| Cherryville, PA | 1,571 | 42 | 16.0% |
| Anderson Island, WA | 1,571 | 30 | 40.0% |
| Canajoharie, NY | 1,571 | 27 | 46.0% |
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