Istanbul weather in April
April in Istanbul: cool, a little rain, with very humid — an excellent time to visit.
#6 of 12 months in Istanbul · #258 of 604 destinations to visit in April · comfort 81/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Istanbul climate normals — April
| Daytime high | 15°C / 58°F | 🙂 cool |
|---|---|---|
| Nighttime low | 9°C / 47°F | |
| Feels like (high) | 13°C / 55°F | |
| Rainfall | 72 mm / 2.8 in | 🌦 some rain |
| Rainy days | 12 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 8°C / 46°F | |
| Sunshine | 9.9 h/day | |
| Daylight | 13.3 h | |
| Wind | 21 km/h / 13 mph | |
| Air quality (US AQI) | 64 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Istanbul in April — FAQ
- Is April a good time to visit Istanbul?
- April in Istanbul: cool, a little rain, with very humid — an excellent time to visit. It ranks #6 of 12 months for Istanbul on SeasonMap's comfort score (81/100).
- What is the weather like in Istanbul in April?
- In April, Istanbul averages a daily high of 14.7°C and a low of 8.5°C, with about 72 mm of rain over roughly 12.4 rainy days.
- What is the air quality in Istanbul in April?
- Istanbul has a mean US Air Quality Index of about 64 in April.