When to go · Istanbul, Turkey
Best time to visit Istanbul
The sweet spot is September, May and June — averages 22°C, 7 rainy days, moderate crowds.
April – June, September – October
Mediterranean-influenced climate with warm, dry summers (32°C) and cool, wet winters (5–8°C). April–June is the sweet spot: flowers blooming on the Bosphorus, pleasant temperatures, manageable crowds. July–August is hot and busy — the city never stops, but the heat is real. September–October brings golden light and the grape harvest. Winter is underrated: the mosques are empty, tea houses are warm, and the city is entirely local.
The short answer
22°C · 7 rainy days · mid season
19°C · 7 rainy days · mid season
23°C · 5 rainy days · high season
Hardest months: December and January. averages 8°C, 13 rainy days, few other visitors.
Month by month
| Month | Avg temp | Rain days | Crowds | Verdict |
|---|---|---|---|---|
| January | 6°C | 13d | low | Wet |
| February | 7°C | 11d | low | Cold |
| March | 9°C | 10d | low | Chilly |
| April | 14°C | 8d | mid | Mild |
| May | 19°C | 7d | mid | Comfortable |
| June | 23°C | 5d | high | Great weather, peak crowds |
| July | 26°C | 3d | high | Great weather, peak crowds |
| August | 26°C | 3d | high | Great weather, peak crowds |
| September | 22°C | 7d | mid | Comfortable |
| October | 17°C | 10d | mid | Comfortable but damp |
| November | 12°C | 11d | low | Chilly |
| December | 8°C | 13d | low | Wet |
Verdicts are read off the three columns to their left — temperature distance from 21°C first, then rainfall, with crowds breaking ties. Averages, so any given week can differ.
If you'd rather go cheap than perfect
January, February, March, November and December are low season in Istanbul — thinner crowds, and the months where accommodation is easiest to book late. Budget travellers already work to about $30–55 a day here; low season is where the accommodation share of that goes furthest.
Book the month you picked
Fares move with the same seasons as the crowds — the quiet months above are usually the cheap ones to fly.