S
M
T
W
T
F
S
26
69°
57°
27
70°
55°
28
69°
55°
29
69°
56°
30
70°
58°
31
70°
58°
1
68°
55°
2
67°
56°
3
67°
54°
4
68°
55°
5
67°
52°
6
67°
57°
7
68°
58°
8
72°
57°
9
71°
57°
10
67°
56°
11
67°
56°
12
69°
57°
13
69°
56°
14
67°
55°
15
65°
52°
16
66°
52°
17
65°
51°
18
67°
56°
19
68°
57°
20
71°
57°
21
72°
56°
22
72°
56°
23
71°
52°
24
68°
50°
25
66°
50°
26
66°
47°
27
62°
47°
28
62°
48°
29
64°
50°
30
63°
49°
31
64°
50°
1
66°
49°
2
67°
52°
3
66°
50°
4
65°
47°
5
63°
45°
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 62° to 72°, with overnight lows between 45° and 58°. The average high for August is 67° with an average low of 53°. 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.
