| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 34°F | 46°F | 39°F | 9.0" |
| February | 34°F | 49°F | 40°F | 4.0" |
| March | 36°F | 52°F | 43°F | 4.2" |
| April | 38°F | 58°F | 47°F | 2.9" |
| May | 43°F | 65°F | 53°F | 4.4" |
| June | 49°F | 70°F | 59°F | 3.3" |
| July | 54°F | 79°F | 65°F | 1.9" |
| August | 53°F | 77°F | 64°F | 3.2" |
| September | 49°F | 72°F | 59°F | 3.7" |
| October | 42°F | 60°F | 50°F | 5.2" |
| November | 39°F | 51°F | 44°F | 8.1" |
| December | 32°F | 44°F | 38°F | 6.1" |
| Index | Nisqually Indian Community | Washington | National |
| Air quality index | 30 | 36 | 42 |
| Pollution index | 6,704,330 | 4,541,850 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 323 |
| Days with moderate air quality | 42 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.003% |
| Benzene | 0.100% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.030% |
| Mercury | 0.003% |
| City | Population | Air Quality Index | National Avg. |
| Tenino, WA | 1,744 | 20 | 60.0% |
| Clover Creek, WA | 6,893 | 30 | 40.0% |
| McChord AFB, WA | 3,268 | 30 | 40.0% |
| Prairie Heights, WA | 4,810 | 30 | 40.0% |
| Anderson Island, WA | 1,571 | 30 | 40.0% |
| Nisqually Indian Community, WA | 591 | 30 | 40.0% |
| City | Population | Air Quality Index | National Avg. |
| Icehouse Canyon, AZ | 591 | 60 | 20.0% |
| Red Feather Lakes, CO | 591 | 48 | 4.0% |
| Hopkins Park, IL | 591 | 55 | 10.0% |
| St. Libory, IL | 591 | 54 | 8.0% |
| Parkers Settlement, IN | 591 | 45 | 10.0% |
| Nisqually Indian Community, WA | 591 | 30 | 40.0% |
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