| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 10°F | 28°F | 19°F | 4.0" |
| February | 10°F | 29°F | 19°F | 3.2" |
| March | 19°F | 38°F | 28°F | 3.5" |
| April | 34°F | 56°F | 44°F | 3.8" |
| May | 46°F | 68°F | 56°F | 4.0" |
| June | 55°F | 75°F | 64°F | 6.0" |
| July | 60°F | 79°F | 69°F | 4.5" |
| August | 57°F | 77°F | 67°F | 4.5" |
| September | 51°F | 72°F | 60°F | 4.3" |
| October | 40°F | 58°F | 48°F | 4.9" |
| November | 29°F | 46°F | 37°F | 3.4" |
| December | 17°F | 32°F | 24°F | 4.5" |
| Index | Troy | 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. |
| Lowell, VT | 149 | 37 | 26.0% |
| Coventry, VT | 30 | 37 | 26.0% |
| Irasburg, VT | 108 | 37 | 26.0% |
| Orleans, VT | 970 | 37 | 26.0% |
| Richford, VT | 1,665 | 37 | 26.0% |
| Troy, VT | 60 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Smithville, AR | 60 | 45 | 10.0% |
| Campo Bonito, AZ | 60 | 47 | 6.0% |
| Carrick, CA | 60 | 42 | 16.0% |
| Paskenta, CA | 60 | 41 | 18.0% |
| Jeisyville, IL | 60 | 40 | 20.0% |
| Troy, VT | 60 | 37 | 26.0% |
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