| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 14°F | 32°F | 23°F | 4.2" |
| February | 13°F | 33°F | 23°F | 2.7" |
| March | 18°F | 41°F | 30°F | 6.2" |
| April | 34°F | 56°F | 45°F | 4.6" |
| May | 43°F | 68°F | 55°F | 4.7" |
| June | 54°F | 79°F | 67°F | 6.5" |
| July | 58°F | 81°F | 69°F | 5.9" |
| August | 57°F | 81°F | 69°F | 3.8" |
| September | 49°F | 75°F | 62°F | 3.8" |
| October | 43°F | 63°F | 52°F | 8.4" |
| November | 30°F | 50°F | 40°F | 6.3" |
| December | 20°F | 35°F | 28°F | 4.5" |
| Index | Wilmington | Vermont | National |
| Air quality index | 35 | 36 | 42 |
| Pollution index | 6,535,100 | 1,478,772 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 345 |
| Days with moderate air quality | 20 |
| 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 | 0.010% |
| Lead | 0.090% |
| Mercury | 0.050% |
| City | Population | Air Quality Index | National Avg. |
| West Brattleboro, VT | 3,042 | 34 | 32.0% |
| Newfane, VT | 137 | 34 | 32.0% |
| North Adams, MA | 12,897 | 35 | 30.0% |
| Arlington, VT | 1,483 | 35 | 30.0% |
| Jacksonville, VT | 252 | 35 | 30.0% |
| Wilmington, VT | 475 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Ualapue, HI | 475 | 15 | 70.0% |
| Diagonal, IA | 475 | 39 | 22.0% |
| Garden Valley, ID | 475 | 36 | 28.0% |
| Dayton, IL | 475 | 0 | 100.0% |
| Grantfork, IL | 475 | 54 | 8.0% |
| Wilmington, VT | 475 | 35 | 30.0% |
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