Generally, average daily wearther in Istanbul right through the month of October is 14 with a general average high of 19 and low of 12. The table below has some further insights:
| Month | Degrees Celsius |
|---|---|
| Temperature | 14 |
| High Temperature | 19 |
| Low Temperature | 12 |
| Sunshine Per Day | 7 |
Useful Links: Istanbul Weather: Average Weather & Yearly Climate