US Geography / US Weather / Pennsylvania Weather / Mount Joy |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 36 | 40 | 51 | 62 | 74 | 82 | 85 | 84 | 77 | 66 | 54 | 41 |
| Avg. Low | 18 | 20 | 30 | 38 | 48 | 57 | 61 | 58 | 52 | 41 | 34 | 24 |
| Mean | 28 | 31 | 41 | 51 | 61 | 70 | 74 | 72 | 65 | 54 | 44 | 34 |
| Avg. Precip. | 2.7 in | 2.3 in | 2.9 in | 3.4 in | 4.0 in | 4.3 in | 4.9 in | 3.4 in | 3.4 in | 3.0 in | 3.5 in | 3.1 in |
Degrees in Fahrenheit
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