US Geography / US Weather / Maryland Weather / McHenry |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 35 | 38 | 48 | 58 | 68 | 76 | 78 | 78 | 72 | 62 | 50 | 38 |
| Avg. Low | 15 | 17 | 25 | 34 | 44 | 51 | 56 | 55 | 48 | 37 | 28 | 20 |
| Mean | 26 | 28 | 38 | 47 | 56 | 64 | 68 | 67 | 60 | 50 | 40 | 30 |
| Avg. Precip. | 3.3 in | 3.0 in | 4.1 in | 4.3 in | 4.7 in | 4.4 in | 5.1 in | 4.3 in | 3.3 in | 3.3 in | 3.6 in | 3.7 in |
Degrees in Fahrenheit
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