Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 32°F | 47°F | 39°F | 7.3" |
February | 32°F | 51°F | 41°F | 4.8" |
March | 35°F | 55°F | 44°F | 7.0" |
April | 36°F | 61°F | 48°F | 3.5" |
May | 42°F | 68°F | 55°F | 2.7" |
June | 47°F | 73°F | 59°F | 1.5" |
July | 50°F | 80°F | 64°F | 0.6" |
August | 50°F | 81°F | 64°F | 1.0" |
September | 46°F | 74°F | 59°F | 2.5" |
October | 41°F | 62°F | 51°F | 5.5" |
November | 35°F | 52°F | 44°F | 9.7" |
December | 31°F | 46°F | 38°F | 8.0" |
Index | Napavine | Washington | National |
Air quality index | 20 | 36 | 42 |
Pollution index | 4,215,410 | 4,541,850 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 343 |
Days with moderate air quality | 22 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.005% |
Benzene | 0.050% |
Carbon Tetrachloride | 0.004% |
Lead | 0.030% |
Mercury | 0.250% |
City | Population | Air Quality Index | National Avg. |
Ryderwood, WA | 401 | 18 | 64.0% |
Vader, WA | 696 | 18 | 64.0% |
Onalaska, WA | 431 | 20 | 60.0% |
Fords Prairie, WA | 2,582 | 20 | 60.0% |
Winlock, WA | 1,740 | 20 | 60.0% |
Napavine, WA | 1,571 | 20 | 60.0% |
City | Population | Air Quality Index | National Avg. |
Loma, CO | 1,571 | 44 | 12.0% |
Aragon, GA | 1,571 | 44 | 12.0% |
Canajoharie, NY | 1,571 | 27 | 46.0% |
Cardington, OH | 1,571 | 41 | 18.0% |
Cherryville, PA | 1,571 | 42 | 16.0% |
Napavine, WA | 1,571 | 20 | 60.0% |