| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 35°F | 48°F | 42°F | 5.6" |
| February | 37°F | 51°F | 43°F | 3.7" |
| March | 39°F | 55°F | 46°F | 5.1" |
| April | 42°F | 60°F | 50°F | 3.2" |
| May | 47°F | 68°F | 56°F | 2.2" |
| June | 52°F | 72°F | 61°F | 1.5" |
| July | 56°F | 80°F | 66°F | 0.6" |
| August | 56°F | 80°F | 66°F | 1.1" |
| September | 53°F | 73°F | 61°F | 1.9" |
| October | 46°F | 62°F | 53°F | 4.5" |
| November | 40°F | 53°F | 46°F | 7.1" |
| December | 35°F | 47°F | 41°F | 6.1" |
| Index | Burien | Washington | National |
| Air quality index | 45 | 36 | 42 |
| Pollution index | 1,081,430 | 4,541,850 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 236 |
| Days with moderate air quality | 127 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Ruston, WA | 1,329 | 18 | 64.0% |
| Canterwood, WA | 3,070 | 18 | 64.0% |
| East Port Orchard, WA | 5,069 | 18 | 64.0% |
| Southworth, WA | 2,300 | 18 | 64.0% |
| Port Orchard, WA | 14,303 | 18 | 64.0% |
| Burien, WA | 51,588 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Perth Amboy, NJ | 51,589 | 51 | 2.0% |
| La Crosse, WI | 51,543 | 35 | 30.0% |
| Coeur d'Alene, ID | 51,491 | 43 | 14.0% |
| Kentwood, MI | 51,780 | 38 | 24.0% |
| Levittown, NY | 51,266 | 51 | 2.0% |
| Burien, WA | 51,588 | 45 | 10.0% |
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