| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 28°F | 43°F | 34°F | 1.8" |
| February | 30°F | 47°F | 38°F | 1.0" |
| March | 34°F | 54°F | 42°F | 1.4" |
| April | 36°F | 59°F | 46°F | 1.7" |
| May | 42°F | 68°F | 54°F | 2.7" |
| June | 49°F | 77°F | 62°F | 2.4" |
| July | 56°F | 90°F | 73°F | 2.0" |
| August | 55°F | 88°F | 71°F | 2.1" |
| September | 48°F | 80°F | 63°F | 1.7" |
| October | 41°F | 64°F | 51°F | 2.1" |
| November | 33°F | 50°F | 40°F | 1.4" |
| December | 26°F | 40°F | 32°F | 1.2" |
| Index | Lonerock | Oregon | National |
| Air quality index | 38 | 32 | 42 |
| Pollution index | 15,448,300 | 7,156,356 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 286 |
| Days with moderate air quality | 72 |
| Days w/ poor A.Q. for sensitive groups | 6 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.170% |
| Carbon Tetrachloride | 0.030% |
| Lead | 0.050% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Condon, OR | 764 | 23 | 54.0% |
| Lonerock, OR | 20 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Lake Minchumina, AK | 20 | 38 | 24.0% |
| Tonsina, AK | 20 | 31 | 38.0% |
| Megargel, AL | 20 | 37 | 26.0% |
| Hunter Creek, AZ | 20 | 60 | 20.0% |
| Salmon Creek, CA | 20 | 34 | 32.0% |
| Lonerock, OR | 20 | 38 | 24.0% |
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