Normally the average daily weather in Koper all through April is 11 with a general average high of 18 and average daily low being 8 degrees. We have put some more details below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 11 |
| High Temperature | 18 |
| Low Temperature | 8 |
Useful Links: Koper Weather: Average Weather & Yearly Climate