Istanbul weather in April
In April, Istanbul has an average high of 16 °C60 °F and an average low of 9 °C48 °F, with about 42 mm1.6 in of precipitation. It is the 8th warmest month of the year and ranks 8th for precipitation.
How April compares with other months
Compared with March, April is 3.5 °C6.3 °F warmer on average and drier by 12 mm0.5 in. Compared with May, April is 5.4 °C9.6 °F cooler on average and wetter by 6 mm0.2 in. Daylight lasts about 13.3 hours around the middle of the month. Average relative humidity is 76% and the average cloud amount 61%.
Is April a good time to visit Istanbul?
April is not among the most comfortable months by our comfort score: it is cool (average high 16 °C60 °F). The most comfortable months in Istanbul are May–October.
What to wear in April
For Istanbul in April, pack long sleeves, a sweater and a medium jacket.
April in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Istanbul | 1660 | 948 | 421.6 |
| Üsküdar | 1660 | 948 | 421.6 |
| Ümraniye | 1559 | 846 | 441.7 |
| Küçükçekmece | 1660 | 847 | 421.6 |
| Maltepe | 1559 | 846 | 441.7 |
| İzmit | 1864 | 745 | 481.9 |
| Nilüfer | 2068 | 947 | 512.0 |
| Bursa | 1967 | 846 | 512.0 |
| Çorlu | 1661 | 744 | 411.6 |
Nearby places that are more than 1 °C1.8 °F warmer in April: Nilüfer and Bursa.
Other months in Istanbul
- January8 °C47 °F / 4 °C38 °F
- February9 °C49 °F / 4 °C39 °F
- March12 °C53 °F / 6 °C42 °F
- April16 °C60 °F / 9 °C48 °F
- May21 °C70 °F / 14 °C57 °F
- June26 °C79 °F / 19 °C66 °F
- July29 °C84 °F / 22 °C71 °F
- August29 °C84 °F / 22 °C72 °F
- September25 °C77 °F / 19 °C66 °F
- October20 °C68 °F / 14 °C58 °F
- November15 °C59 °F / 10 °C50 °F
- December10 °C50 °F / 6 °C42 °F
Frequently asked questions
How warm is Istanbul in April?
In April the average high in Istanbul is 16 °C (60 °F) and the average low is 9 °C (48 °F).
Does it rain a lot in Istanbul in April?
On average about 42 mm (1.6 in) of precipitation falls in April; it ranks 8th of the 12 months.
Is April the warmest month in Istanbul?
No. The warmest month in Istanbul is August, with an average high of 29 °C (84 °F). The coldest month is January, with an average low of 4 °C (38 °F).
How long is the day in Istanbul in April?
In the middle of April the day in Istanbul lasts about 13.3 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Istanbul in April?
The average relative humidity in April is about 76%. This is a long-term average for the whole day.
How cloudy is Istanbul in April?
On average about 61% of the sky is covered by cloud in April. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.