| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 6°F | 28°F | 16°F | 3.6" |
| February | 6°F | 28°F | 17°F | 2.5" |
| March | 15°F | 38°F | 26°F | 3.8" |
| April | 31°F | 53°F | 42°F | 6.7" |
| May | 39°F | 65°F | 52°F | 4.4" |
| June | 54°F | 79°F | 66°F | 3.3" |
| July | 56°F | 80°F | 67°F | 6.0" |
| August | 55°F | 80°F | 67°F | 5.3" |
| September | 49°F | 74°F | 60°F | 3.4" |
| October | 41°F | 60°F | 49°F | 8.7" |
| November | 26°F | 44°F | 35°F | 5.8" |
| December | 14°F | 31°F | 22°F | 3.6" |
| Index | Jeffersonville | 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. |
| Fairfax, VT | 1,145 | 37 | 26.0% |
| Johnson, VT | 1,627 | 37 | 26.0% |
| Jericho, VT | 1,077 | 37 | 26.0% |
| Morrisville, VT | 2,017 | 37 | 26.0% |
| Milton, VT | 3,913 | 37 | 26.0% |
| Jeffersonville, VT | 667 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Happy Valley, AK | 667 | 31 | 38.0% |
| Yarnell, AZ | 667 | 43 | 14.0% |
| Glen St. Mary, FL | 667 | 38 | 24.0% |
| Russell, IA | 667 | 39 | 22.0% |
| Paris, ID | 667 | 44 | 12.0% |
| Jeffersonville, VT | 667 | 37 | 26.0% |
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