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				| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation | 
| January | 19°F | 38°F | 27°F | 5.0" | 
| February | 16°F | 37°F | 25°F | 4.6" | 
| March | 24°F | 45°F | 34°F | 7.3" | 
| April | 36°F | 60°F | 47°F | 9.2" | 
| May | 45°F | 68°F | 56°F | 7.8" | 
| June | 56°F | 81°F | 67°F | 3.2" | 
| July | 61°F | 85°F | 72°F | 4.2" | 
| August | 61°F | 86°F | 72°F | 4.0" | 
| September | 53°F | 79°F | 65°F | 3.1" | 
| October | 45°F | 65°F | 54°F | 9.5" | 
| November | 31°F | 53°F | 41°F | 4.7" | 
| December | 20°F | 38°F | 29°F | 5.5" | 
| Index | Burlington | 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. | 
| Lowell, MA | 111,311 | 37 | 26.0% | 
| Lawrence, MA | 80,022 | 37 | 26.0% | 
| Littleton Common, MA | 3,370 | 40 | 20.0% | 
| Maynard, MA | 10,900 | 40 | 20.0% | 
| Cochituate, MA | 6,730 | 43 | 14.0% | 
| Burlington, MA | 28,077 | 43 | 14.0% | 
| City | Population | Air Quality Index | National Avg. | 
| Greenville, TX | 28,088 | 51 | 2.0% | 
| Immokalee, FL | 28,060 | 34 | 32.0% | 
| Saratoga Springs, NY | 28,056 | 37 | 26.0% | 
| Melrose, MA | 28,054 | 43 | 14.0% | 
| Bethany, OR | 28,047 | 38 | 24.0% | 
| Burlington, MA | 28,077 | 43 | 14.0% |