| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 35°F | 45°F | 40°F | 2.5" |
| February | 36°F | 50°F | 42°F | 2.8" |
| March | 41°F | 55°F | 47°F | 3.5" |
| April | 43°F | 58°F | 49°F | 3.5" |
| May | 48°F | 65°F | 55°F | 3.0" |
| June | 51°F | 66°F | 57°F | 2.2" |
| July | 55°F | 74°F | 63°F | 2.0" |
| August | 55°F | 74°F | 62°F | 1.7" |
| September | 50°F | 66°F | 57°F | 2.8" |
| October | 46°F | 59°F | 51°F | 3.4" |
| November | 38°F | 48°F | 43°F | 4.8" |
| December | 35°F | 45°F | 39°F | 8.6" |
| Index | Lofall | Washington | National |
| Air quality index | 18 | 36 | 42 |
| Pollution index | 1,626,160 | 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 | 0.005% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.020% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Meadowdale, WA | 3,162 | 18 | 64.0% |
| Seabeck, WA | 854 | 18 | 64.0% |
| Bangor Base, WA | 6,825 | 18 | 64.0% |
| Brinnon, WA | 889 | 18 | 64.0% |
| Tracyton, WA | 5,494 | 18 | 64.0% |
| Lofall, WA | 2,119 | 18 | 64.0% |
| City | Population | Air Quality Index | National Avg. |
| Creola, AL | 2,119 | 42 | 16.0% |
| Hanscom AFB, MA | 2,119 | 43 | 14.0% |
| Icard, NC | 2,119 | 43 | 14.0% |
| Leith-Hatfield, PA | 2,119 | 36 | 28.0% |
| Mediapolis, IA | 2,118 | 29 | 42.0% |
| Lofall, WA | 2,119 | 18 | 64.0% |
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