| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 10°F | 27°F | 18°F | 2.4" |
| February | 11°F | 30°F | 20°F | 2.7" |
| March | 20°F | 39°F | 29°F | 2.6" |
| April | 34°F | 55°F | 43°F | 3.5" |
| May | 45°F | 68°F | 56°F | 4.4" |
| June | 54°F | 75°F | 64°F | 5.1" |
| July | 59°F | 79°F | 68°F | 5.6" |
| August | 57°F | 77°F | 66°F | 4.5" |
| September | 50°F | 70°F | 59°F | 3.4" |
| October | 40°F | 57°F | 48°F | 5.2" |
| November | 29°F | 45°F | 36°F | 3.0" |
| December | 19°F | 32°F | 25°F | 4.1" |
| Index | Concord | Vermont | National |
| Air quality index | 40 | 36 | 42 |
| Pollution index | 1,278,430 | 1,478,772 | 2,726,193 |
| Measurement | Total |
| Days measured | 324 |
| Days with good air quality | 314 |
| Days with moderate air quality | 10 |
| 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. |
| Barnet, VT | 147 | 40 | 20.0% |
| Bethlehem, NH | 1,061 | 40 | 20.0% |
| Danville, VT | 398 | 40 | 20.0% |
| East Burke, VT | 69 | 40 | 20.0% |
| Lancaster, NH | 1,892 | 40 | 20.0% |
| Concord, VT | 176 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Glacier View, AK | 176 | 31 | 38.0% |
| Point Lay, AK | 176 | 38 | 24.0% |
| Alpine, AZ | 176 | 44 | 12.0% |
| Little River, CA | 176 | 33 | 34.0% |
| San Geronimo, CA | 176 | 40 | 20.0% |
| Concord, VT | 176 | 40 | 20.0% |
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