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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 12°F | 35°F | 23°F | 2.8" |
| February | 12°F | 37°F | 25°F | 3.3" |
| March | 21°F | 46°F | 33°F | 3.3" |
| April | 32°F | 62°F | 47°F | 3.8" |
| May | 43°F | 73°F | 57°F | 4.1" |
| June | 52°F | 80°F | 66°F | 5.0" |
| July | 58°F | 85°F | 71°F | 4.4" |
| August | 55°F | 84°F | 69°F | 4.1" |
| September | 48°F | 77°F | 62°F | 3.8" |
| October | 38°F | 64°F | 50°F | 6.5" |
| November | 28°F | 52°F | 39°F | 3.3" |
| December | 18°F | 40°F | 29°F | 4.4" |
| Index | Hooksett | New Hampshire | National |
| Air quality index | 37 | 34 | 42 |
| Pollution index | 4,139,320 | 3,959,618 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 353 |
| Days with moderate air quality | 12 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.020% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Contoocook, NH | 1,353 | 27 | 46.0% |
| Pittsfield, NH | 1,464 | 27 | 46.0% |
| Loudon, NH | 830 | 27 | 46.0% |
| Suncook, NH | 4,975 | 27 | 46.0% |
| Concord, NH | 43,503 | 27 | 46.0% |
| Hooksett, NH | 5,517 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| McKenzie, TN | 5,517 | 27 | 46.0% |
| Ulysses, KS | 5,518 | 15 | 70.0% |
| Caruthersville, MO | 5,518 | 26 | 48.0% |
| Connell, WA | 5,518 | 37 | 26.0% |
| Waterville, OH | 5,519 | 40 | 20.0% |
| Hooksett, NH | 5,517 | 37 | 26.0% |
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