Normally average temperatures in Guernsey during the month of August is 15. Highs are around 19 degrees with a low of 14. The table below has further info:
| Month | Degrees Celsius |
|---|---|
| Temperature | 15 |
| High Temperature | 19 |
| Low Temperature | 14 |
| Sunshine Per Day | 8 |
Useful Links: Guernsey Weather: Average Weather & Yearly Climate