S
M
T
W
T
F
S
26
45°
30°
27
46°
30°
28
46°
30°
29
48°
28°
30
57°
37°
1
64°
32°
2
66°
37°
3
57°
39°
4
48°
34°
5
48°
32°
6
50°
28°
7
55°
25°
8
59°
27°
9
59°
32°
10
59°
32°
11
59°
43°
12
52°
43°
13
57°
46°
14
52°
45°
15
63°
43°
16
64°
43°
17
52°
41°
18
66°
49°
19
63°
47°
20
65°
42°
21
68°
46°
22
62°
45°
23
70°
48°
24
63°
46°
25
60°
44°
26
62°
42°
27
64°
43°
28
64°
44°
29
66°
45°
30
63°
46°
31
59°
50°
1
62°
49°
2
60°
47°
3
60°
47°
4
64°
48°
5
66°
51°
6
66°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Turku
Turku's May 2026 forecast shows daily high temperatures ranging from 59° to 70°, with overnight lows between 42° and 51°. The average high for May is 64° with an average low of 47°. 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 Turku. See also: June | July | August.