| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 46°F | 41°F | 3.8" |
| February | 37°F | 49°F | 42°F | 2.7" |
| March | 39°F | 52°F | 45°F | 4.4" |
| April | 42°F | 57°F | 48°F | 2.8" |
| May | 47°F | 64°F | 54°F | 2.2" |
| June | 51°F | 68°F | 58°F | 1.8" |
| July | 55°F | 74°F | 63°F | 0.7" |
| August | 56°F | 75°F | 63°F | 0.9" |
| September | 53°F | 69°F | 59°F | 2.0" |
| October | 47°F | 59°F | 52°F | 3.6" |
| November | 40°F | 51°F | 45°F | 5.7" |
| December | 35°F | 44°F | 39°F | 4.9" |
| Index | Freeland | Washington | National |
| Air quality index | 24 | 36 | 42 |
| Pollution index | 1,626,160 | 4,541,850 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 361 |
| Days with moderate air quality | 4 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.005% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.020% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Quilcene, WA | 664 | 18 | 64.0% |
| Kayak Point, WA | 1,500 | 24 | 52.0% |
| Warm Beach, WA | 2,934 | 24 | 52.0% |
| Cavalero, WA | 5,395 | 24 | 52.0% |
| Lake Goodwin, WA | 4,613 | 24 | 52.0% |
| Freeland, WA | 1,883 | 24 | 52.0% |
| City | Population | Air Quality Index | National Avg. |
| Leon, IA | 1,883 | 39 | 22.0% |
| Manteo, NC | 1,883 | 40 | 20.0% |
| Cairo, IL | 1,884 | 44 | 12.0% |
| Ridgely, TN | 1,882 | 26 | 48.0% |
| Anson, TX | 1,884 | 26 | 48.0% |
| Freeland, WA | 1,883 | 24 | 52.0% |
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