| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 29°F | 43°F | 36°F | 2.7" |
| February | 30°F | 45°F | 37°F | 7.4" |
| March | 37°F | 55°F | 45°F | 3.9" |
| April | 47°F | 67°F | 57°F | 2.4" |
| May | 57°F | 76°F | 66°F | 4.8" |
| June | 66°F | 84°F | 75°F | 8.6" |
| July | 71°F | 88°F | 79°F | 10.7" |
| August | 68°F | 85°F | 76°F | 8.2" |
| September | 62°F | 80°F | 71°F | 5.1" |
| October | 52°F | 68°F | 60°F | 4.5" |
| November | 41°F | 57°F | 49°F | 4.8" |
| December | 35°F | 48°F | 41°F | 3.2" |
| Index | Ridgely | Maryland | National |
| Air quality index | 42 | 43 | 42 |
| Pollution index | 1,358,370 | 5,342,367 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 293 |
| Days with moderate air quality | 72 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Queen Anne, MD | 1,183 | 36 | 28.0% |
| Denton, MD | 4,488 | 36 | 28.0% |
| Queen Anne town, MD | 290 | 36 | 28.0% |
| West Denton, MD | 14 | 36 | 28.0% |
| Hillsboro, MD | 101 | 36 | 28.0% |
| Ridgely, MD | 1,956 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Willow, AK | 1,956 | 31 | 38.0% |
| Vincent, AL | 1,956 | 38 | 24.0% |
| Darien, GA | 1,956 | 36 | 28.0% |
| Gila Bend, AZ | 1,955 | 74 | 48.0% |
| Pecatonica, IL | 1,957 | 42 | 16.0% |
| Ridgely, MD | 1,956 | 42 | 16.0% |
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