| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 27°F | 45°F | 35°F | 4.8" |
| February | 28°F | 47°F | 36°F | 6.4" |
| March | 36°F | 57°F | 46°F | 6.0" |
| April | 45°F | 68°F | 56°F | 6.7" |
| May | 55°F | 76°F | 65°F | 6.5" |
| June | 64°F | 84°F | 74°F | 8.6" |
| July | 68°F | 88°F | 78°F | 8.7" |
| August | 66°F | 86°F | 76°F | 7.5" |
| September | 60°F | 80°F | 69°F | 8.6" |
| October | 49°F | 69°F | 58°F | 8.1" |
| November | 38°F | 58°F | 47°F | 7.5" |
| December | 32°F | 50°F | 40°F | 7.1" |
| Index | Suitland | Maryland | National |
| Air quality index | 47 | 43 | 42 |
| Pollution index | 849,185 | 5,342,367 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 209 |
| Days with moderate air quality | 145 |
| Days w/ poor A.Q. for sensitive groups | 10 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Odenton, MD | 42,258 | 46 | 8.0% |
| Beltsville, MD | 17,922 | 47 | 6.0% |
| South Laurel, MD | 27,593 | 47 | 6.0% |
| Dunkirk, MD | 2,175 | 47 | 6.0% |
| Largo, MD | 11,633 | 47 | 6.0% |
| Suitland, MD | 25,273 | 47 | 6.0% |
| City | Population | Air Quality Index | National Avg. |
| Franklin, IN | 25,276 | 54 | 8.0% |
| El Cerrito, CA | 25,280 | 40 | 20.0% |
| Prince Edward County, ON | 25,289 | n/a | |
| Clinton, IA | 25,290 | 42 | 16.0% |
| Mount Pleasant, MI | 25,290 | 26 | 48.0% |
| Suitland, MD | 25,273 | 47 | 6.0% |
Here are the best places to live in Maryland
Check out the 10 safest cities in Maryland
These are the 10 cheapest cities in Maryland
Most Dangerous Cities In The US