| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 12°F | 31°F | 21°F | 4.7" |
| February | 13°F | 33°F | 22°F | 2.9" |
| March | 21°F | 42°F | 31°F | 4.2" |
| April | 33°F | 57°F | 44°F | 4.6" |
| May | 43°F | 70°F | 56°F | 6.0" |
| June | 52°F | 76°F | 63°F | 6.8" |
| July | 57°F | 81°F | 68°F | 6.9" |
| August | 55°F | 79°F | 66°F | 8.1" |
| September | 48°F | 73°F | 59°F | 6.6" |
| October | 39°F | 60°F | 48°F | 8.7" |
| November | 28°F | 47°F | 37°F | 4.1" |
| December | 20°F | 36°F | 27°F | 5.0" |
| Index | Bradford | Vermont | National |
| Air quality index | 34 | 36 | 42 |
| Pollution index | 5,847,470 | 1,478,772 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 328 |
| Days with moderate air quality | 37 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.050% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.180% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| North Haverhill, NH | 1,155 | 34 | 32.0% |
| Newbury, VT | 397 | 34 | 32.0% |
| Woodsville, NH | 1,152 | 34 | 32.0% |
| Wells River, VT | 409 | 34 | 32.0% |
| Mountain Lakes, NH | 643 | 34 | 32.0% |
| Bradford, VT | 925 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Warsaw, MN | 925 | 37 | 26.0% |
| McLeansville, NC | 925 | 43 | 14.0% |
| Valley City, OH | 925 | 50 | = 100 |
| Laurys Station, PA | 925 | 42 | 16.0% |
| Volente, TX | 925 | 44 | 12.0% |
| Bradford, VT | 925 | 34 | 32.0% |
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