| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 9°F | 29°F | 19°F | 1.7" |
| February | 10°F | 30°F | 20°F | 1.6" |
| March | 19°F | 40°F | 29°F | 1.7" |
| April | 32°F | 55°F | 43°F | 2.8" |
| May | 43°F | 69°F | 56°F | 3.8" |
| June | 52°F | 76°F | 63°F | 5.0" |
| July | 57°F | 80°F | 68°F | 5.0" |
| August | 55°F | 78°F | 66°F | 3.8" |
| September | 48°F | 73°F | 59°F | 2.7" |
| October | 38°F | 59°F | 48°F | 4.0" |
| November | 27°F | 46°F | 36°F | 1.9" |
| December | 17°F | 34°F | 25°F | 2.9" |
| Index | Hardwick | Vermont | National |
| Air quality index | 37 | 36 | 42 |
| Pollution index | 1,278,430 | 1,478,772 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 335 |
| Days with moderate air quality | 30 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Worcester, VT | 106 | 37 | 26.0% |
| Marshfield, VT | 367 | 37 | 26.0% |
| Albany, VT | 176 | 37 | 26.0% |
| Hyde Park, VT | 399 | 37 | 26.0% |
| Greensboro, VT | 125 | 37 | 26.0% |
| Hardwick, VT | 1,012 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Baileyton, AL | 1,012 | 44 | 12.0% |
| Ellicott, CO | 1,012 | 45 | 10.0% |
| Patterson Springs, NC | 1,012 | 36 | 28.0% |
| Weleetka, OK | 1,012 | 43 | 14.0% |
| Scio, OR | 1,012 | 28 | 44.0% |
| Hardwick, VT | 1,012 | 37 | 26.0% |
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