| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 13°F | 30°F | 21°F | 3.8" |
| February | 13°F | 30°F | 20°F | 1.4" |
| March | 20°F | 40°F | 29°F | 6.1" |
| April | 35°F | 56°F | 44°F | 3.7" |
| May | 43°F | 66°F | 53°F | 2.8" |
| June | 57°F | 79°F | 66°F | 4.7" |
| July | 60°F | 80°F | 68°F | 5.2" |
| August | 59°F | 79°F | 68°F | 4.1" |
| September | 52°F | 74°F | 62°F | 5.1" |
| October | 44°F | 62°F | 51°F | 11.1" |
| November | 30°F | 47°F | 38°F | 4.8" |
| December | 19°F | 33°F | 25°F | 2.2" |
| Index | Wells | Vermont | National |
| Air quality index | 36 | 36 | 42 |
| Pollution index | 1,162,920 | 1,478,772 | 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 | 0.000% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.000% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Argyle, NY | 403 | 35 | 30.0% |
| Dorset, VT | 387 | 36 | 28.0% |
| Wallingford, VT | 1,029 | 36 | 28.0% |
| Fair Haven, VT | 2,273 | 36 | 28.0% |
| West Rutland, VT | 2,072 | 36 | 28.0% |
| Wells, VT | 448 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Grubbs, AR | 448 | 45 | 10.0% |
| Prattsville, AR | 448 | 45 | 10.0% |
| Andrew, IA | 448 | 42 | 16.0% |
| Badger, IA | 448 | 37 | 26.0% |
| Marquette, IA | 448 | 29 | 42.0% |
| Wells, VT | 448 | 36 | 28.0% |
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