| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 18°F | 38°F | 28°F | 2.3" |
| February | 18°F | 39°F | 28°F | 2.6" |
| March | 27°F | 49°F | 38°F | 3.2" |
| April | 38°F | 63°F | 50°F | 3.6" |
| May | 47°F | 74°F | 60°F | 3.4" |
| June | 56°F | 81°F | 68°F | 5.4" |
| July | 62°F | 85°F | 73°F | 3.9" |
| August | 59°F | 83°F | 70°F | 4.9" |
| September | 52°F | 77°F | 64°F | 3.7" |
| October | 42°F | 66°F | 53°F | 4.0" |
| November | 31°F | 54°F | 42°F | 2.2" |
| December | 25°F | 43°F | 33°F | 3.9" |
| Index | Mechanicstown | New York | National |
| Air quality index | 36 | 43 | 42 |
| Pollution index | 9,612,350 | 6,179,275 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 319 |
| Days with moderate air quality | 46 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.030% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.020% |
| Lead | 0.230% |
| Mercury | 0.080% |
| City | Population | Air Quality Index | National Avg. |
| Vernon Valley, NJ | 1,171 | 34 | 32.0% |
| Unionville, NY | 544 | 34 | 32.0% |
| Wallkill, NY | 2,012 | 36 | 28.0% |
| South Blooming Grove, NY | 3,166 | 36 | 28.0% |
| Rock Hill, NY | 2,204 | 36 | 28.0% |
| Mechanicstown, NY | 7,770 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Altoona, WI | 7,769 | 34 | 32.0% |
| Firebaugh, CA | 7,772 | 50 | = 100 |
| Wahpeton, ND | 7,772 | 33 | 34.0% |
| Los Fresnos, TX | 7,767 | 44 | 12.0% |
| Wynne, AR | 7,773 | 45 | 10.0% |
| Mechanicstown, NY | 7,770 | 36 | 28.0% |
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