Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 34°F | 49°F | 41°F | 5.6" |
February | 35°F | 53°F | 43°F | 4.1" |
March | 37°F | 58°F | 47°F | 5.4" |
April | 39°F | 63°F | 50°F | 2.9" |
May | 45°F | 71°F | 57°F | 2.3" |
June | 50°F | 76°F | 62°F | 1.3" |
July | 54°F | 86°F | 69°F | 0.3" |
August | 54°F | 86°F | 69°F | 0.4" |
September | 50°F | 80°F | 63°F | 1.8" |
October | 43°F | 66°F | 54°F | 4.1" |
November | 38°F | 55°F | 46°F | 6.7" |
December | 33°F | 48°F | 40°F | 7.4" |
Index | Silverton | Oregon | National |
Air quality index | 32 | 32 | 42 |
Pollution index | 11,541,100 | 7,156,356 | 2,726,193 |
Measurement | Total |
Days measured | 356 |
Days with good air quality | 302 |
Days with moderate air quality | 54 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.010% |
Benzene | 0.140% |
Carbon Tetrachloride | 0.020% |
Lead | 0.020% |
Mercury | 0.010% |
City | Population | Air Quality Index | National Avg. |
Salem, OR | 171,806 | 32 | 36.0% |
Gervais, OR | 2,726 | 32 | 36.0% |
Labish Village, OR | 491 | 32 | 36.0% |
Scotts Mills, OR | 421 | 32 | 36.0% |
Stayton, OR | 8,199 | 32 | 36.0% |
Silverton, OR | 10,426 | 32 | 36.0% |
City | Population | Air Quality Index | National Avg. |
Union City, TN | 10,426 | 26 | 48.0% |
Newcastle, OK | 10,425 | 48 | 4.0% |
Del Aire, CA | 10,424 | 72 | 44.0% |
Sugarmill Woods, FL | 10,424 | 30 | 40.0% |
Little Canada, MN | 10,423 | 46 | 8.0% |
Silverton, OR | 10,426 | 32 | 36.0% |