S
M
T
W
T
F
S
26
66°
63°
27
68°
63°
28
70°
64°
29
70°
63°
30
67°
63°
31
66°
62°
1
67°
63°
2
68°
62°
3
69°
61°
4
69°
62°
5
71°
61°
6
70°
60°
7
68°
61°
8
69°
61°
9
70°
62°
10
70°
62°
11
69°
61°
12
69°
59°
13
68°
59°
14
68°
62°
15
67°
62°
16
68°
61°
17
70°
61°
18
69°
62°
19
69°
60°
20
68°
59°
21
65°
56°
22
64°
53°
23
62°
53°
24
62°
54°
25
63°
53°
26
61°
55°
27
61°
57°
28
62°
57°
29
62°
59°
30
66°
58°
31
67°
56°
1
65°
57°
2
66°
56°
3
66°
58°
4
65°
59°
5
66°
58°
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 61° to 71°, with overnight lows between 53° and 64°. The average high for August is 67° with an average low of 59°. 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.
