| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 12°F | 31°F | 21°F | 4.3" |
| February | 11°F | 32°F | 21°F | 3.9" |
| March | 18°F | 41°F | 29°F | 5.3" |
| April | 32°F | 56°F | 44°F | 7.2" |
| May | 41°F | 68°F | 54°F | 4.5" |
| June | 55°F | 79°F | 66°F | 5.1" |
| July | 58°F | 81°F | 69°F | 5.2" |
| August | 56°F | 81°F | 68°F | 2.4" |
| September | 49°F | 76°F | 61°F | 3.2" |
| October | 42°F | 62°F | 51°F | 10.5" |
| November | 27°F | 46°F | 36°F | 7.6" |
| December | 16°F | 33°F | 24°F | 4.4" |
| Index | Ludlow | Vermont | National |
| Air quality index | 36 | 36 | 42 |
| Pollution index | 1,843,420 | 1,478,772 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 322 |
| Days with moderate air quality | 43 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.000% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Charlestown, NH | 933 | 34 | 32.0% |
| Cavendish, VT | 184 | 34 | 32.0% |
| Perkinsville, VT | 164 | 34 | 32.0% |
| Chester, VT | 1,023 | 34 | 32.0% |
| Hartland, VT | 537 | 34 | 32.0% |
| Ludlow, VT | 646 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| McIntyre, GA | 646 | 38 | 24.0% |
| Florien, LA | 646 | 30 | 40.0% |
| Lilesville, NC | 646 | 49 | 2.0% |
| Wright City, OK | 646 | 39 | 22.0% |
| Oak Grove, TX | 646 | 51 | 2.0% |
| Ludlow, VT | 646 | 36 | 28.0% |
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