Climate - Mercersburg - Pennsylvania
| Jan | Feb | March | April | May | June | |
|---|---|---|---|---|---|---|
| Average high in °F | 39 | 43 | 53 | 65 | 74 | 83 |
| Average low in °F | 21 | 23 | 29 | 39 | 47 | 57 |
| Av. precipitation - inch | 2.8 | 2.44 | 3.66 | 3.7 | 4.33 | 4.17 |
| July | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|
| Average high in °F | 87 | 85 | 78 | 66 | 54 | 43 |
| Average low in °F | 61 | 59 | 51 | 39 | 33 | 24 |
| Av. precipitation - inch | 3.7 | 3.94 | 3.7 | 3.5 | 3.43 | 3.15 |
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Mercersburg Climate Graph - Pennsylvania Climate Chart
Totals and averages
| Annual average high temperature | 64.3 °F |
| Annual average low temperature | 40.2 °F |
| Average temperature | 52.2 °F |
| Average annual precipitation | 42.5 in. |