US Geography / US Weather / Massachusetts Weather / Chelmsford |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 34 | 36 | 46 | 57 | 68 | 78 | 84 | 82 | 74 | 64 | 50 | 38 |
| Avg. Low | 14 | 16 | 26 | 36 | 47 | 56 | 61 | 58 | 51 | 40 | 31 | 21 |
| Mean | 24 | 27 | 36 | 47 | 58 | 68 | 74 | 71 | 64 | 52 | 41 | 30 |
| Avg. Precip. | 3.3 in | 3.1 in | 3.3 in | 3.7 in | 3.4 in | 3.4 in | 3.1 in | 3.3 in | 3.3 in | 3.6 in | 4.5 in | 4.0 in |
Degrees in Fahrenheit
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