| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 40°F | 48°F | 43°F | 6.4" |
| February | 41°F | 49°F | 44°F | 4.4" |
| March | 42°F | 50°F | 46°F | 5.4" |
| April | 44°F | 53°F | 48°F | 2.7" |
| May | 48°F | 57°F | 52°F | 1.4" |
| June | 50°F | 60°F | 54°F | 0.8" |
| July | 52°F | 62°F | 56°F | 0.4" |
| August | 52°F | 64°F | 57°F | 0.8" |
| September | 51°F | 62°F | 56°F | 2.3" |
| October | 48°F | 57°F | 52°F | 4.2" |
| November | 43°F | 51°F | 47°F | 6.7" |
| December | 39°F | 47°F | 43°F | 5.7" |
| Index | Clallam Bay | Washington | National |
| Air quality index | 34 | 36 | 42 |
| Pollution index | 480,925 | 4,541,850 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 341 |
| Days with moderate air quality | 24 |
| 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 | 0.001% |
| Lead | 0.040% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Sekiu, WA | 45 | 34 | 32.0% |
| Clallam Bay, WA | 752 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Salt Creek, CO | 752 | 20 | 60.0% |
| Wingo, KY | 752 | 44 | 12.0% |
| Deerwood, MN | 752 | 29 | 42.0% |
| Palatine Bridge, NY | 752 | 27 | 46.0% |
| Ohio City, OH | 752 | 39 | 22.0% |
| Clallam Bay, WA | 752 | 34 | 32.0% |