| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 9°F | 28°F | 19°F | 2.1" |
| February | 11°F | 30°F | 20°F | 2.5" |
| March | 19°F | 39°F | 29°F | 2.7" |
| April | 32°F | 55°F | 43°F | 3.3" |
| May | 43°F | 68°F | 55°F | 4.3" |
| June | 52°F | 75°F | 63°F | 6.0" |
| July | 57°F | 79°F | 68°F | 5.5" |
| August | 55°F | 78°F | 66°F | 4.0" |
| September | 48°F | 71°F | 59°F | 3.3" |
| October | 38°F | 58°F | 47°F | 5.2" |
| November | 27°F | 46°F | 36°F | 2.7" |
| December | 17°F | 33°F | 25°F | 3.6" |
| Index | Northfield | 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. |
| South Barre, VT | 1,110 | 34 | 32.0% |
| Barre, VT | 8,590 | 34 | 32.0% |
| Graniteville, VT | 907 | 34 | 32.0% |
| Chelsea, VT | 463 | 34 | 32.0% |
| Websterville, VT | 380 | 34 | 32.0% |
| Northfield, VT | 4,413 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| West Jefferson, OH | 4,413 | 46 | 8.0% |
| Wainwright No. 61, AB | 4,413 | n/a | |
| Rogersville, TN | 4,412 | 44 | 12.0% |
| St. James, MN | 4,414 | 32 | 36.0% |
| Georgetown, OH | 4,414 | 54 | 8.0% |
| Northfield, VT | 4,413 | 37 | 26.0% |
Here are the best places to live in Vermont
These are the largest cities in Vermont
These are the 10 cheapest cities in Vermont
See the best places to live in Northfield