| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 46°F | 41°F | 6.0" |
| February | 38°F | 49°F | 43°F | 4.2" |
| March | 39°F | 53°F | 45°F | 5.8" |
| April | 42°F | 58°F | 49°F | 3.1" |
| May | 47°F | 66°F | 55°F | 2.4" |
| June | 51°F | 71°F | 59°F | 1.3" |
| July | 55°F | 77°F | 64°F | 0.6" |
| August | 55°F | 77°F | 65°F | 0.8" |
| September | 52°F | 71°F | 60°F | 1.5" |
| October | 47°F | 60°F | 52°F | 4.5" |
| November | 41°F | 51°F | 46°F | 6.8" |
| December | 36°F | 45°F | 40°F | 5.8" |
| Index | Rosedale | Washington | National |
| Air quality index | 18 | 36 | 42 |
| Pollution index | 1,081,430 | 4,541,850 | 2,726,193 |
| Measurement | Total |
| Days measured | 340 |
| Days with good air quality | 338 |
| Days with moderate air quality | 2 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| 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. |
| Browns Point, WA | 989 | 18 | 64.0% |
| East Port Orchard, WA | 5,187 | 18 | 64.0% |
| Grapeview, WA | 727 | 18 | 64.0% |
| Vaughn, WA | 1,093 | 18 | 64.0% |
| Bethel, WA | 4,328 | 18 | 64.0% |
| Rosedale, WA | 4,559 | 18 | 64.0% |
| City | Population | Air Quality Index | National Avg. |
| Pendleton, IN | 4,559 | 42 | 16.0% |
| Rogersville, TN | 4,559 | 44 | 12.0% |
| Lebanon, IL | 4,558 | 54 | 8.0% |
| Dundee, MI | 4,560 | 1 | 98.0% |
| Armonk, NY | 4,557 | 43 | 14.0% |
| Rosedale, WA | 4,559 | 18 | 64.0% |