Typically, the expected weather in Harlech in the course of September is 7 with a normal high in the month being 12 degrees celsius and a low of 6. The table below has further info:
| Month | Degrees Celsius |
|---|---|
| Temperature | 7 |
| High Temperature | 12 |
| Low Temperature | 6 |
Useful Links: Harlech Weather: Average Weather & Yearly Climate