İstanbul Weather Averages

Climate averages for İstanbul based on 10 years of historical data.

Average İstanbul temperatures by month

Avg high

9°

J

10°

F

12°

M

16°

A

20°

M

25°

J

28°

J

29°

A

25°

S

20°

O

16°

N

12°

D

Avg low

6°

J

6°

F

7°

M

10°

A

15°

M

20°

J

23°

J

23°

A

20°

S

16°

O

12°

N

8°

D

Average rainfall in İstanbul by month

Rainfall (mm)

101

J

74

F

74

M

54

A

48

M

41

J

29

J

17

A

48

S

48

O

81

N

83

D

Sunshine hours in İstanbul by month

Sunshine (h/day)

2

J

3

F

3

M

5

A

6

M

7

J

9

J

8

A

6

S

4

O

3

N

3

D

Humidity in İstanbul by month

Average humidity

73%

J

73%

F

70%

M

68%

A

68%

M

65%

J

62%

J

64%

A

63%

S

68%

O

69%

N

72%

D

Sea temperature in İstanbul by month

Sea temp

10°

J

9°

F

9°

M

11°

A

14°

M

20°

J

25°

J

25°

A

24°

S

20°

O

16°

N

12°

D

Month-by-month averages

Month	Avg High	Avg Low	Rainfall	Sunshine	Sea Temp
Ocak Hava Durumu	9°C	6°C	101 mm	2.1h	10.3°C
Şubat Hava Durumu	10°C	6°C	74 mm	3.1h	8.8°C
Mart Hava Durumu	12°C	7°C	74 mm	3.3h	9.5°C
Nisan Hava Durumu	16°C	10°C	54 mm	5.4h	11.4°C
Mayıs Hava Durumu	20°C	15°C	48 mm	6.1h	14.3°C
Haziran Hava Durumu	25°C	20°C	41 mm	6.9h	20.4°C
Temmuz Hava Durumu	28°C	23°C	29 mm	8.8h	24.8°C
Ağustos Hava Durumu	29°C	23°C	17 mm	7.9h	24.9°C
Eylül Hava Durumu	25°C	20°C	48 mm	5.5h	24.3°C
Ekim Hava Durumu	20°C	16°C	48 mm	4.3h	20.4°C
Kasım Hava Durumu	16°C	12°C	81 mm	3.5h	16.4°C
Aralık Hava Durumu	12°C	8°C	83 mm	2.6h	12.3°C