Normally, the average daily temperature in Interlaken in April is 6. Highs are expected to be 8 and low average expected to be 3 celsius. We have put some more information here:
| Month | Degrees Celsius |
|---|---|
| Temperature | 6 |
| High Temperature | 8 |
| Low Temperature | 3 |
| Sunshine Per Day | 7 |
Useful Links: Interlaken Weather: Average Weather & Yearly Climate