Normally, average daily temperatures in Harlech during the time of May is 10 with a typical high being 14 and low being around 9. Our table below has the full details:
| Month | Degrees Celsius |
|---|---|
| Temperature | 10 |
| High Temperature | 14 |
| Low Temperature | 9 |
Useful Links: Harlech Weather: Average Weather & Yearly Climate