S
M
T
W
T
F
S
26
67°
61°
27
69°
59°
28
69°
57°
29
75°
55°
30
76°
54°
31
N/A
1
69°
58°
2
67°
59°
3
67°
58°
4
68°
60°
5
66°
58°
6
66°
57°
7
66°
57°
8
67°
58°
9
67°
59°
10
66°
57°
11
67°
57°
12
66°
58°
13
68°
55°
14
66°
54°
15
66°
56°
16
69°
55°
17
71°
54°
18
68°
54°
19
66°
56°
20
67°
56°
21
69°
55°
22
67°
56°
23
67°
55°
24
66°
55°
25
68°
54°
26
65°
54°
27
68°
55°
28
69°
56°
29
70°
54°
30
66°
54°
31
63°
53°
1
65°
53°
2
67°
52°
3
66°
53°
4
62°
52°
5
62°
52°
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 71°, with overnight lows between 52° and 60°. The average high for August is 67° with an average low of 56°. 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.
