| 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 | Eastmoreland | Portland | Oregon |
| Air quality index | 38 | 38 | 32 |
| Pollution index | 24,235,400 | 1,899,410 | 5,374,527 |
| 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, State | Population | Air Quality Index | National Avg. |
| Fairview, OR | 9,215 | 38 | 24% |
| Wood Village, OR | 3,996 | 38 | 24% |
| Beaverton, OR | 94,865 | 38 | 24% |
| Gladstone, OR | 11,850 | 38 | 24% |
| Metzger, OR | 3,967 | 38 | 24% |
| Portland, OR | 620,589 | 38 | 24% |
| City, State | Population | Air Quality Index | National Avg. |
| Baltimore, MD | 621,000 | 46 | 8% |
| Oklahoma City, OK | 620,015 | 48 | 4% |
| Las Vegas, NV | 613,295 | 54 | 8% |
| Louisville, KY | 611,573 | 49 | 2% |
| Milwaukee, WI | 598,672 | 44 | 12% |
| Portland, OR | 620,589 | 38 | 24% |
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