US Geography / US Weather / Massachusetts Weather / Waltham |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 34 | 36 | 46 | 57 | 68 | 77 | 82 | 80 | 72 | 62 | 50 | 38 |
| Avg. Low | 14 | 16 | 26 | 35 | 45 | 54 | 60 | 58 | 48 | 38 | 31 | 20 |
| Mean | 24 | 27 | 36 | 46 | 57 | 66 | 71 | 70 | 61 | 51 | 41 | 28 |
| Avg. Precip. | 3.7 in | 3.6 in | 3.8 in | 3.9 in | 3.7 in | 3.5 in | 3.4 in | 3.4 in | 3.4 in | 3.7 in | 4.6 in | 4.3 in |
Degrees in Fahrenheit
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