S
M
T
W
T
F
S
26
62°
51°
27
63°
50°
28
62°
51°
29
61°
55°
30
58°
53°
1
59°
51°
2
58°
52°
3
59°
51°
4
58°
51°
5
60°
52°
6
67°
56°
7
61°
56°
8
60°
53°
9
61°
54°
10
61°
50°
11
62°
51°
12
60°
50°
13
65°
57°
14
68°
58°
15
63°
57°
16
64°
56°
17
64°
58°
18
65°
56°
19
64°
57°
20
64°
56°
21
65°
57°
22
66°
55°
23
70°
59°
24
69°
58°
25
71°
59°
26
72°
59°
27
74°
62°
28
74°
61°
29
73°
62°
30
75°
64°
31
76°
61°
1
76°
59°
2
73°
62°
3
74°
63°
4
75°
61°
5
75°
62°
6
74°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Istanbul
Istanbul's May 2026 forecast shows daily high temperatures ranging from 58° to 76°, with overnight lows between 50° and 64°. The average high for May is 66° with an average low of 56°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Istanbul. See also: June | July | August.
