Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 40°F | 56°F | 47°F | 14.3" |
February | 41°F | 56°F | 47°F | 10.3" |
March | 42°F | 56°F | 48°F | 14.1" |
April | 43°F | 59°F | 50°F | 9.9" |
May | 47°F | 64°F | 54°F | 6.0" |
June | 50°F | 68°F | 58°F | 8.1" |
July | 52°F | 69°F | 59°F | 2.7" |
August | 52°F | 69°F | 59°F | 1.5" |
September | 52°F | 71°F | 59°F | 6.0" |
October | 49°F | 66°F | 56°F | 11.9" |
November | 44°F | 58°F | 50°F | 14.5" |
December | 40°F | 54°F | 46°F | 14.1" |
Index | O'Brien | Oregon | National |
Air quality index | 26 | 32 | 42 |
Pollution index | 13,842,600 | 7,156,356 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 283 |
Days with moderate air quality | 77 |
Days w/ poor A.Q. for sensitive groups | 3 |
Days with unhealthy air quality | 2 |
Pollutant | Total |
Arsenic | 0.020% |
Benzene | 0.210% |
Carbon Tetrachloride | 0.030% |
Lead | 0.030% |
Mercury | 0.020% |
City | Population | Air Quality Index | National Avg. |
Cave Junction, OR | 2,153 | 26 | 48.0% |
Kerby, OR | 282 | 26 | 48.0% |
Selma, OR | 913 | 26 | 48.0% |
Takilma, OR | 465 | 26 | 48.0% |
O'Brien, OR | 639 | 26 | 48.0% |
City | Population | Air Quality Index | National Avg. |
Norfolk, CT | 639 | 37 | 26.0% |
Swea City, IA | 639 | 15 | 70.0% |
Apple Canyon Lake, IL | 639 | 29 | 42.0% |
New Market, IN | 639 | 42 | 16.0% |
Sicily Island, LA | 639 | 34 | 32.0% |
O'Brien, OR | 639 | 26 | 48.0% |