Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 34°F | 48°F | 40°F | 4.9" |
February | 36°F | 53°F | 43°F | 3.4" |
March | 39°F | 58°F | 48°F | 4.8" |
April | 42°F | 63°F | 52°F | 3.0" |
May | 48°F | 71°F | 58°F | 2.8" |
June | 53°F | 76°F | 63°F | 1.7" |
July | 57°F | 84°F | 69°F | 0.5" |
August | 58°F | 85°F | 70°F | 0.5" |
September | 53°F | 78°F | 64°F | 1.8" |
October | 47°F | 66°F | 55°F | 3.7" |
November | 40°F | 55°F | 47°F | 6.2" |
December | 34°F | 47°F | 40°F | 6.2" |
Index | Cathedral Park | Portland | Oregon |
Air quality index | 38 | 38 | 32 |
Pollution index | 3,247,580 | 1,899,410 | 7,156,356 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 285 |
Days with moderate air quality | 77 |
Days w/ poor A.Q. for sensitive groups | 3 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.003% |
Benzene | 0.020% |
Carbon Tetrachloride | 0.010% |
Lead | 0.010% |
Mercury | 0.002% |
City | Population | Air Quality Index | National Avg. |
Hockinson, WA | 6,159 | 38 | 24.0% |
Beaverton, OR | 98,567 | 38 | 24.0% |
Garden Home-Whitford, OR | 7,295 | 38 | 24.0% |
King City, OR | 4,345 | 38 | 24.0% |
Oak Grove, OR | 17,781 | 38 | 24.0% |
Portland, OR | 650,380 | 38 | 24.0% |
City | Population | Air Quality Index | National Avg. |
Memphis, TN | 650,910 | 45 | 10.0% |
Oklahoma City, OK | 649,821 | 48 | 4.0% |
Las Vegas, NV | 644,594 | 54 | 8.0% |
Nashville, TN | 667,070 | 45 | 10.0% |
Detroit, MI | 672,351 | 56 | 12.0% |
Portland, OR | 650,380 | 38 | 24.0% |