S
M
T
W
T
F
S
26
70°
57°
27
70°
55°
28
71°
52°
29
69°
53°
30
69°
53°
31
73°
55°
1
73°
59°
2
75°
57°
3
74°
56°
4
72°
56°
5
74°
55°
6
74°
58°
7
73°
57°
8
71°
57°
9
69°
56°
10
71°
55°
11
68°
55°
12
67°
53°
13
68°
54°
14
70°
52°
15
67°
51°
16
66°
50°
17
67°
52°
18
65°
52°
19
69°
54°
20
69°
54°
21
67°
53°
22
71°
55°
23
71°
55°
24
72°
51°
25
70°
48°
26
69°
48°
27
64°
50°
28
67°
51°
29
68°
52°
30
67°
48°
31
67°
46°
1
65°
47°
2
61°
46°
3
61°
48°
4
64°
45°
5
60°
42°
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 60° to 75°, with overnight lows between 42° and 59°. The average high for August is 69° 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.
