| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 39°F | 31°F | 6.8" |
| February | 23°F | 39°F | 30°F | 6.4" |
| March | 29°F | 46°F | 37°F | 7.5" |
| April | 38°F | 56°F | 47°F | 9.7" |
| May | 48°F | 65°F | 56°F | 6.2" |
| June | 58°F | 73°F | 65°F | 8.0" |
| July | 64°F | 79°F | 72°F | 9.7" |
| August | 62°F | 77°F | 69°F | 9.2" |
| September | 55°F | 70°F | 62°F | 14.3" |
| October | 45°F | 61°F | 53°F | 4.9" |
| November | 38°F | 52°F | 45°F | 10.3" |
| December | 28°F | 44°F | 36°F | 7.1" |
| Index | Popponesset | Massachusetts | National |
| Air quality index | 36 | 40 | 42 |
| Pollution index | 7,903,830 | 8,399,610 | 2,726,193 |
| Measurement | Total |
| Days measured | 359 |
| Days with good air quality | 348 |
| Days with moderate air quality | 11 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.060% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.080% |
| Mercury | 0.030% |
| City | Population | Air Quality Index | National Avg. |
| Falmouth, MA | 3,751 | 36 | 28.0% |
| North Falmouth, MA | 2,572 | 36 | 28.0% |
| Seabrook, MA | 520 | 36 | 28.0% |
| Wareham Center, MA | 2,631 | 36 | 28.0% |
| Bourne, MA | 1,377 | 36 | 28.0% |
| Popponesset, MA | 202 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Fairford, AL | 202 | 42 | 16.0% |
| Ratcliff, AR | 202 | 36 | 28.0% |
| Carrizo, AZ | 202 | 44 | 12.0% |
| Greenhorn, CA | 202 | 44 | 12.0% |
| Alpine, CO | 202 | 44 | 12.0% |
| Popponesset, MA | 202 | 36 | 28.0% |
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