Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 22°F | 41°F | 31°F | 1.1" |
February | 25°F | 50°F | 37°F | 0.8" |
March | 30°F | 59°F | 44°F | 0.8" |
April | 34°F | 67°F | 51°F | 0.5" |
May | 42°F | 77°F | 60°F | 1.0" |
June | 48°F | 83°F | 67°F | 0.4" |
July | 55°F | 93°F | 76°F | 0.1" |
August | 53°F | 92°F | 73°F | 0.2" |
September | 44°F | 82°F | 63°F | 0.4" |
October | 36°F | 67°F | 50°F | 0.8" |
November | 27°F | 52°F | 39°F | 0.9" |
December | 20°F | 40°F | 29°F | 1.5" |
Index | Zillah | Washington | National |
Air quality index | 38 | 36 | 42 |
Pollution index | 697,942 | 4,541,850 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 227 |
Days with moderate air quality | 128 |
Days w/ poor A.Q. for sensitive groups | 10 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.020% |
Benzene | 0.004% |
Carbon Tetrachloride | 0.001% |
Lead | 0.010% |
Mercury | 0.010% |
City | Population | Air Quality Index | National Avg. |
Mabton, WA | 2,192 | 38 | 24.0% |
Moxee, WA | 4,111 | 38 | 24.0% |
Union Gap, WA | 6,167 | 38 | 24.0% |
Buena, WA | 845 | 38 | 24.0% |
Outlook, WA | 158 | 38 | 24.0% |
Zillah, WA | 3,137 | 38 | 24.0% |
City | Population | Air Quality Index | National Avg. |
Knoxville, IL | 3,137 | 41 | 18.0% |
Blanchard, LA | 3,137 | 39 | 22.0% |
Mamou, LA | 3,137 | 41 | 18.0% |
Elgin, OK | 3,137 | 43 | 14.0% |
Milbank, SD | 3,137 | 25 | 50.0% |
Zillah, WA | 3,137 | 38 | 24.0% |