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 | Centralia | Washington | National |
Air quality index | 20 | 36 | 42 |
Pollution index | 6,915,950 | 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 | 0.000% |
Benzene | 0.110% |
Carbon Tetrachloride | 0.010% |
Lead | 0.000% |
Mercury | 0.001% |
City | Population | Air Quality Index | National Avg. |
Oakville, WA | 647 | 20 | 60.0% |
Chehalis, WA | 7,607 | 20 | 60.0% |
Rochester, WA | 4,854 | 20 | 60.0% |
Onalaska, WA | 431 | 20 | 60.0% |
Fords Prairie, WA | 2,582 | 20 | 60.0% |
Centralia, WA | 17,473 | 20 | 60.0% |
City | Population | Air Quality Index | National Avg. |
Tiffin, OH | 17,473 | 40 | 20.0% |
Hanover, MB | 17,472 | n/a | |
Amesbury Town, MA | 17,474 | 37 | 26.0% |
Brownsville, FL | 17,475 | 41 | 18.0% |
Redland, MD | 17,475 | 47 | 6.0% |
Centralia, WA | 17,473 | 20 | 60.0% |