S
M
T
W
T
F
S
30
64°
53°
31
63°
51°
1
66°
50°
2
66°
53°
3
67°
54°
4
65°
54°
5
64°
53°
6
64°
53°
7
63°
51°
8
62°
53°
9
63°
51°
10
61°
50°
11
62°
49°
12
59°
45°
13
58°
45°
14
56°
43°
15
55°
43°
16
55°
48°
17
57°
49°
18
58°
47°
19
60°
51°
20
62°
48°
21
61°
48°
22
58°
47°
23
56°
47°
24
56°
46°
25
57°
43°
26
55°
47°
27
55°
49°
28
57°
44°
29
57°
38°
30
54°
42°
1
53°
38°
2
54°
44°
3
53°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Turku
Turku's September 2026 forecast shows daily high temperatures ranging from 53° to 67°, with overnight lows between 38° and 54°. The average high for September is 59° with an average low of 48°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Turku. See also: October | November | December.
