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 | Waltham | Massachusetts | National |
Air quality index | 43 | 40 | 42 |
Pollution index | 7,556,320 | 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 | 0.010% |
Benzene | 0.070% |
Carbon Tetrachloride | 0.040% |
Lead | 0.010% |
Mercury | 0.040% |
City | Population | Air Quality Index | National Avg. |
Hopkinton, MA | 3,864 | 40 | 20.0% |
Littleton Common, MA | 3,370 | 40 | 20.0% |
Maynard, MA | 10,900 | 40 | 20.0% |
Cordaville, MA | 2,884 | 40 | 20.0% |
Framingham, MA | 72,846 | 40 | 20.0% |
Waltham, MA | 62,597 | 43 | 14.0% |
City | Population | Air Quality Index | National Avg. |
Pico Rivera, CA | 62,507 | 72 | 44.0% |
Montebello, CA | 62,697 | 72 | 44.0% |
Coon Rapids, MN | 62,706 | 46 | 8.0% |
North Miami, FL | 62,468 | 41 | 18.0% |
Springfield, OR | 62,729 | 38 | 24.0% |
Waltham, MA | 62,597 | 43 | 14.0% |