| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 11°F | 31°F | 22°F | 3.2" |
| February | 12°F | 33°F | 23°F | 2.5" |
| March | 21°F | 43°F | 32°F | 3.7" |
| April | 34°F | 60°F | 47°F | 3.7" |
| May | 43°F | 69°F | 56°F | 3.0" |
| June | 55°F | 78°F | 66°F | 5.1" |
| July | 58°F | 81°F | 70°F | 5.6" |
| August | 56°F | 79°F | 68°F | 4.5" |
| September | 48°F | 72°F | 60°F | 3.2" |
| October | 38°F | 59°F | 48°F | 6.2" |
| November | 29°F | 49°F | 39°F | 3.7" |
| December | 18°F | 35°F | 27°F | 4.6" |
| Index | Hadley | New York | National |
| Air quality index | 37 | 43 | 42 |
| Pollution index | 2,246,780 | 6,179,275 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 322 |
| Days with moderate air quality | 43 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.060% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.050% |
| Mercury | 0.050% |
| City | Population | Air Quality Index | National Avg. |
| Fort Edward, NY | 3,275 | 35 | 30.0% |
| Glens Falls, NY | 14,322 | 35 | 30.0% |
| Schuylerville, NY | 1,408 | 35 | 30.0% |
| South Glens Falls, NY | 3,612 | 35 | 30.0% |
| Victory, NY | 717 | 35 | 30.0% |
| Hadley, NY | 1,043 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Coker, AL | 1,043 | 35 | 30.0% |
| Earlington, KY | 1,043 | 43 | 14.0% |
| Marianne, PA | 1,043 | 33 | 34.0% |
| Saint-Bonaventure, QC | 1,043 | n/a | |
| Brantley, AL | 1,042 | 52 | 4.0% |
| Hadley, NY | 1,043 | 37 | 26.0% |
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