Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 36°F | 46°F | 40°F | 4.7" |
February | 38°F | 51°F | 44°F | 3.2" |
March | 40°F | 57°F | 47°F | 5.2" |
April | 42°F | 63°F | 51°F | 3.6" |
May | 48°F | 71°F | 58°F | 2.8" |
June | 53°F | 76°F | 63°F | 2.1" |
July | 56°F | 84°F | 69°F | 0.5" |
August | 56°F | 85°F | 69°F | 0.4" |
September | 52°F | 78°F | 64°F | 1.6" |
October | 46°F | 65°F | 55°F | 4.5" |
November | 42°F | 53°F | 47°F | 6.5" |
December | 35°F | 45°F | 40°F | 5.1" |
Index | Fern Prairie | Washington | National |
Air quality index | 38 | 36 | 42 |
Pollution index | 1,899,410 | 4,541,850 | 2,726,193 |
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. |
Wood Village, OR | 4,069 | 38 | 24.0% |
Hockinson, WA | 6,159 | 38 | 24.0% |
Venersborg, WA | 3,973 | 38 | 24.0% |
Happy Valley, OR | 22,049 | 38 | 24.0% |
Portland, OR | 650,380 | 38 | 24.0% |
Fern Prairie, WA | 1,989 | 38 | 24.0% |
City | Population | Air Quality Index | National Avg. |
Dolan Springs, AZ | 1,989 | 54 | 8.0% |
Veedersburg, IN | 1,989 | 42 | 16.0% |
Princeton Junction, NJ | 1,989 | 41 | 18.0% |
Mount Ayr, IA | 1,988 | 39 | 22.0% |
Parma, ID | 1,990 | 36 | 28.0% |
Fern Prairie, WA | 1,989 | 38 | 24.0% |