| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 30°F | 49°F | 40°F | 5.8" |
| February | 26°F | 44°F | 35°F | 4.8" |
| March | 34°F | 52°F | 43°F | 6.6" |
| April | 43°F | 62°F | 52°F | 7.0" |
| May | 50°F | 69°F | 60°F | 5.2" |
| June | 64°F | 79°F | 71°F | 7.2" |
| July | 69°F | 85°F | 77°F | 6.9" |
| August | 70°F | 86°F | 78°F | 2.9" |
| September | 62°F | 80°F | 72°F | 2.6" |
| October | 54°F | 71°F | 63°F | 7.4" |
| November | 41°F | 59°F | 50°F | 4.3" |
| December | 32°F | 50°F | 41°F | 6.8" |
| Index | Bishopville | Maryland | National |
| Air quality index | 36 | 43 | 42 |
| Pollution index | 7,219,540 | 5,342,367 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 303 |
| Days with moderate air quality | 61 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.060% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.030% |
| Mercury | 0.110% |
| City | Population | Air Quality Index | National Avg. |
| Bethany Beach, DE | 1,150 | 36 | 28.0% |
| Millsboro, DE | 4,448 | 36 | 28.0% |
| Ocean City, MD | 6,957 | 36 | 28.0% |
| Whaleyville, MD | 48 | 36 | 28.0% |
| Parsonsburg, MD | 287 | 36 | 28.0% |
| Bishopville, MD | 634 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Fuller Acres, CA | 634 | 67 | 34.0% |
| Vernon, FL | 634 | 38 | 24.0% |
| Toomsboro, GA | 634 | 38 | 24.0% |
| Doon, IA | 634 | 36 | 28.0% |
| Ririe, ID | 634 | 43 | 14.0% |
| Bishopville, MD | 634 | 36 | 28.0% |
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