| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 15°F | 32°F | 23°F | 3.2" |
| February | 15°F | 33°F | 24°F | 3.6" |
| March | 23°F | 42°F | 32°F | 4.1" |
| April | 35°F | 57°F | 45°F | 4.2" |
| May | 47°F | 69°F | 57°F | 4.7" |
| June | 55°F | 75°F | 64°F | 6.5" |
| July | 61°F | 81°F | 71°F | 9.7" |
| August | 59°F | 79°F | 69°F | 7.2" |
| September | 53°F | 72°F | 62°F | 6.1" |
| October | 42°F | 60°F | 50°F | 8.4" |
| November | 31°F | 48°F | 39°F | 4.8" |
| December | 22°F | 36°F | 29°F | 3.9" |
| Index | New Hampton | New Hampshire | National |
| Air quality index | 31 | 34 | 42 |
| Pollution index | 5,847,470 | 3,959,618 | 2,726,193 |
| Measurement | Total |
| Days measured | 316 |
| Days with good air quality | 308 |
| Days with moderate air quality | 8 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| 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. |
| Ashland, NH | 1,630 | 31 | 38.0% |
| Laconia, NH | 16,584 | 31 | 38.0% |
| Center Sandwich, NH | 98 | 31 | 38.0% |
| Belmont, NH | 1,272 | 31 | 38.0% |
| Meredith, NH | 2,651 | 31 | 38.0% |
| New Hampton, NH | 326 | 31 | 38.0% |
| City | Population | Air Quality Index | National Avg. |
| Anchor Bay, CA | 326 | 33 | 34.0% |
| Low Moor, IA | 326 | 42 | 16.0% |
| Arimo, ID | 326 | 27 | 46.0% |
| London Mills, IL | 326 | 41 | 18.0% |
| Crane, IN | 326 | 1 | 98.0% |
| New Hampton, NH | 326 | 31 | 38.0% |
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