| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 15°F | 32°F | 23°F | 2.7" |
| February | 15°F | 34°F | 24°F | 3.1" |
| March | 23°F | 43°F | 33°F | 2.9" |
| April | 35°F | 58°F | 46°F | 3.4" |
| May | 45°F | 69°F | 57°F | 4.0" |
| June | 54°F | 75°F | 64°F | 5.6" |
| July | 59°F | 80°F | 69°F | 4.9" |
| August | 56°F | 78°F | 67°F | 4.6" |
| September | 50°F | 72°F | 60°F | 4.1" |
| October | 40°F | 60°F | 50°F | 4.9" |
| November | 30°F | 49°F | 39°F | 2.8" |
| December | 22°F | 37°F | 29°F | 3.9" |
| Index | Housatonic | Massachusetts | National |
| Air quality index | 37 | 40 | 42 |
| Pollution index | 4,483,560 | 8,399,610 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 320 |
| Days with moderate air quality | 44 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.050% |
| Carbon Tetrachloride | 0.005% |
| Lead | 0.020% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Chatham, NY | 1,692 | 37 | 26.0% |
| Copake Lake, NY | 761 | 37 | 26.0% |
| Great Barrington, MA | 2,213 | 37 | 26.0% |
| Taconic Shores, NY | 854 | 37 | 26.0% |
| Ghent, NY | 499 | 37 | 26.0% |
| Housatonic, MA | 682 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Benoit, MS | 682 | 43 | 14.0% |
| Juniata, NE | 682 | 19 | 62.0% |
| El Rito, NM | 682 | 41 | 18.0% |
| Adena, OH | 682 | 39 | 22.0% |
| Rocky Mountain, OK | 682 | 36 | 28.0% |
| Housatonic, MA | 682 | 37 | 26.0% |
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