| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 34°F | 25°F | 2.1" |
| February | 23°F | 43°F | 32°F | 2.1" |
| March | 28°F | 53°F | 40°F | 3.9" |
| April | 32°F | 60°F | 46°F | 1.7" |
| May | 40°F | 69°F | 54°F | 3.0" |
| June | 43°F | 74°F | 59°F | 4.4" |
| July | 48°F | 88°F | 69°F | 3.2" |
| August | 46°F | 86°F | 66°F | 1.9" |
| September | 36°F | 74°F | 54°F | 1.7" |
| October | 33°F | 59°F | 45°F | 3.6" |
| November | 25°F | 41°F | 33°F | 4.2" |
| December | 18°F | 32°F | 25°F | 5.4" |
| Index | Newport | Washington | National |
| Air quality index | 43 | 36 | 50 |
| Pollution index | 2,800,290 | 4,541,850 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 252 |
| Days with moderate air quality | 111 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.020% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.020% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Oldtown, ID | 220 | 43 | 14.0% |
| Priest River, ID | 1,639 | 43 | 14.0% |
| Spirit Lake, ID | 2,269 | 43 | 14.0% |
| Blanchard, ID | 233 | 43 | 14.0% |
| Cusick, WA | 101 | 43 | 14.0% |
| Newport, WA | 2,454 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Greentown, IN | 2,454 | 37 | 26.0% |
| Alburtis, PA | 2,454 | 42 | 16.0% |
| Edgewood CDP, PA | 2,454 | 56 | 12.0% |
| Bono, AR | 2,453 | 45 | 10.0% |
| Oakbrook Terrace, IL | 2,453 | 55 | 10.0% |
| Newport, WA | 2,454 | 43 | 14.0% |
Here are the best places to live in Washington
These are the 10 most affordable cities in Washington
10 Best cities in Washington for employment
Top 10 best public schools in Newport