Normally, the average daily temperature in Terceira right through the month of September is 20. Average high is typically 24 with lows around 19. See our table below for a full breakdown:
| Month | Degrees Celsius |
|---|---|
| Temperature | 20 |
| High Temperature | 24 |
| Low Temperature | 19 |
Useful Links: Terceira Weather: Average Weather & Yearly Climate