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				| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation | 
| January | 21°F | 38°F | 29°F | 2.4" | 
| February | 20°F | 39°F | 29°F | 2.6" | 
| March | 28°F | 47°F | 37°F | 3.3" | 
| April | 39°F | 61°F | 49°F | 3.4" | 
| May | 49°F | 71°F | 59°F | 3.7" | 
| June | 57°F | 78°F | 67°F | 4.9" | 
| July | 64°F | 85°F | 74°F | 4.0" | 
| August | 62°F | 83°F | 72°F | 3.5" | 
| September | 55°F | 76°F | 65°F | 3.6" | 
| October | 45°F | 64°F | 54°F | 4.5" | 
| November | 35°F | 53°F | 43°F | 2.9" | 
| December | 26°F | 42°F | 34°F | 3.7" | 
| Index | Andover | Massachusetts | National | 
| Air quality index | 43 | 40 | 42 | 
| Pollution index | 24,018,000 | 8,399,610 | 2,726,193 | 
| Measurement | Total | 
| Days measured | 365 | 
| Days with good air quality | 291 | 
| Days with moderate air quality | 73 | 
| Days w/ poor A.Q. for sensitive groups | 1 | 
| Days with unhealthy air quality | 0 | 
| Pollutant | Total | 
| Arsenic | 0.030% | 
| Benzene | 0.220% | 
| Carbon Tetrachloride | 0.100% | 
| Lead | 0.280% | 
| Mercury | 0.130% | 
| City | Population | Air Quality Index | National Avg. | 
| Haverhill, MA | 63,783 | 37 | 26.0% | 
| Amesbury Town, MA | 17,474 | 37 | 26.0% | 
| Newburyport, MA | 18,197 | 37 | 26.0% | 
| Lawrence, MA | 80,022 | 37 | 26.0% | 
| Hudson, NH | 7,230 | 37 | 26.0% | 
| Andover, MA | 8,821 | 43 | 14.0% | 
| City | Population | Air Quality Index | National Avg. | 
| Oak Grove, MN | 8,819 | 46 | 8.0% | 
| Fort Polk South, LA | 8,823 | 30 | 40.0% | 
| Winchester, TN | 8,818 | 44 | 12.0% | 
| Gulf Hills, MS | 8,824 | 42 | 16.0% | 
| Fort Valley, GA | 8,817 | 38 | 24.0% | 
| Andover, MA | 8,821 | 43 | 14.0% |