| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 1°F | 72°F | 36°F | 2.8" |
| February | 8°F | 72°F | 35°F | 2.1" |
| March | 8°F | 84°F | 44°F | 2.9" |
| April | 26°F | 91°F | 55°F | 4.6" |
| May | 34°F | 95°F | 63°F | 4.5" |
| June | 46°F | 97°F | 73°F | 4.6" |
| July | 54°F | 99°F | 77°F | 4.4" |
| August | 55°F | 102°F | 77°F | 3.2" |
| September | 41°F | 93°F | 69°F | 3.8" |
| October | 30°F | 94°F | 57°F | 5.9" |
| November | 19°F | 77°F | 48°F | 3.7" |
| December | 14°F | 75°F | 38°F | 4.5" |
| Index | Glen Burnie | Maryland | National |
| Air quality index | 46 | 43 | 50 |
| Pollution index | 3,494,010 | 6,283,470 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 213 |
| Days with moderate air quality | 147 |
| Days w/ poor A.Q. for sensitive groups | 5 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.001% |
| City, State | Population | Air Quality Index | National Avg. |
| Arnold, MD | 22,625 | 46 | 8% |
| Bowleys Quarters, MD | 5,998 | 46 | 8% |
| Columbia, MD | 103,439 | 46 | 8% |
| Edgemere, MD | 8,322 | 46 | 8% |
| Essex, MD | 38,955 | 46 | 8% |
| Glen Burnie, MD | 69,060 | 46 | 8% |
| City, State | Population | Air Quality Index | National Avg. |
| Palatine, IL | 69,098 | 60 | 20% |
| Bismarck, ND | 68,981 | 34 | 32% |
| Union City, NJ | 68,965 | 53 | 6% |
| Weston, FL | 68,893 | 41 | 18% |
| Flagstaff, AZ | 69,270 | 42 | 16% |
| Glen Burnie, MD | 69,060 | 46 | 8% |