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				| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation | 
| January | 20°F | 34°F | 27°F | 1.7" | 
| February | 20°F | 35°F | 27°F | 1.6" | 
| March | 29°F | 47°F | 37°F | 2.3" | 
| April | 39°F | 61°F | 49°F | 3.0" | 
| May | 50°F | 72°F | 61°F | 3.7" | 
| June | 61°F | 81°F | 71°F | 3.2" | 
| July | 65°F | 85°F | 75°F | 3.8" | 
| August | 64°F | 83°F | 73°F | 4.4" | 
| September | 57°F | 76°F | 66°F | 3.5" | 
| October | 46°F | 63°F | 54°F | 1.9" | 
| November | 34°F | 51°F | 42°F | 2.3" | 
| December | 26°F | 38°F | 32°F | 2.1" | 
| Index | Forest Park | Detroit | Michigan | 
| Air quality index | 56 | 56 | 69 | 
| Pollution index | 180,667 | 180,667 | 4,161,606 | 
| Measurement | Total | 
| Days measured | 365 | 
| Days with good air quality | 135 | 
| Days with moderate air quality | 217 | 
| Days w/ poor A.Q. for sensitive groups | 13 | 
| Days with unhealthy air quality | 0 | 
| Pollutant | Total | 
| Arsenic | 0.000% | 
| Benzene | 0.002% | 
| Carbon Tetrachloride | 0.001% | 
| Lead | 0.000% | 
| Mercury | 0.000% | 
| City | Population | Air Quality Index | National Avg. | 
| Garden City, MI | 26,565 | 56 | 12.0% | 
| Grosse Pointe Woods, MI | 15,409 | 56 | 12.0% | 
| Village of Grosse Pointe Shores, MI | 2,791 | 56 | 12.0% | 
| Royal Oak, MI | 59,256 | 56 | 12.0% | 
| Hazel Park, MI | 16,452 | 56 | 12.0% | 
| Detroit, MI | 672,351 | 56 | 12.0% | 
| City | Population | Air Quality Index | National Avg. | 
| Nashville, TN | 667,070 | 45 | 10.0% | 
| El Paso, TX | 679,879 | 53 | 6.0% | 
| Boston, MA | 689,326 | 43 | 14.0% | 
| Memphis, TN | 650,910 | 45 | 10.0% | 
| Portland, OR | 650,380 | 38 | 24.0% | 
| Detroit, MI | 672,351 | 56 | 12.0% |