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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 42°F | 32°F | 3.2" |
| February | 25°F | 43°F | 33°F | 2.4" |
| March | 33°F | 55°F | 43°F | 3.9" |
| April | 43°F | 68°F | 55°F | 4.1" |
| May | 52°F | 75°F | 63°F | 4.3" |
| June | 60°F | 82°F | 71°F | 4.8" |
| July | 64°F | 85°F | 74°F | 6.0" |
| August | 63°F | 84°F | 73°F | 4.0" |
| September | 57°F | 79°F | 67°F | 3.2" |
| October | 46°F | 67°F | 56°F | 3.9" |
| November | 36°F | 57°F | 46°F | 2.7" |
| December | 29°F | 46°F | 37°F | 4.1" |
| Index | Oakland | Maryland | National |
| Air quality index | 36 | 43 | 42 |
| Pollution index | 1,427,850 | 5,342,367 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 337 |
| Days with moderate air quality | 27 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.003% |
| Benzene | 0.004% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.001% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Gorman, MD | 195 | 36 | 28.0% |
| Swanton, MD | 0 | 36 | 28.0% |
| Hutton, MD | 65 | 36 | 28.0% |
| Terra Alta, WV | 1,757 | 36 | 28.0% |
| Kitzmiller, MD | 217 | 36 | 28.0% |
| Oakland, MD | 2,099 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Gurdon, AR | 2,099 | 32 | 36.0% |
| Arnold, CA | 2,099 | 39 | 22.0% |
| Hoyt Lakes, MN | 2,099 | 35 | 30.0% |
| Choctaw Lake, OH | 2,099 | 45 | 10.0% |
| Winnsboro Mills, SC | 2,099 | 43 | 14.0% |
| Oakland, MD | 2,099 | 36 | 28.0% |
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