Usually the average weather in Harpers Ferry through August is 20. With the average high being 27 and typical average low being around 17 degrees. For more context we have put some more information below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 20 |
| High Temperature | 27 |
| Low Temperature | 17 |
Useful Links: Harpers Ferry Weather: Average Weather & Yearly Climate