S
M
T
W
T
F
S
26
68°
52°
27
68°
56°
28
69°
58°
29
69°
56°
30
70°
54°
31
67°
58°
1
74°
58°
2
72°
56°
3
70°
53°
4
67°
51°
5
67°
56°
6
66°
55°
7
67°
55°
8
70°
57°
9
69°
57°
10
70°
54°
11
72°
54°
12
71°
50°
13
67°
48°
14
66°
49°
15
66°
49°
16
67°
52°
17
67°
48°
18
68°
49°
19
65°
52°
20
65°
51°
21
64°
50°
22
65°
51°
23
67°
52°
24
66°
51°
25
63°
52°
26
65°
52°
27
65°
50°
28
63°
50°
29
66°
48°
30
67°
53°
31
66°
50°
1
67°
45°
2
64°
46°
3
63°
48°
4
64°
48°
5
66°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Helsinki
Helsinki's August 2026 forecast shows daily high temperatures ranging from 63° to 74°, with overnight lows between 45° and 58°. The average high for August is 67° with an average low of 52°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Helsinki. See also: September | October | November.
