S
M
T
W
T
F
S
27
79°
71°
28
75°
70°
29
74°
70°
30
78°
68°
31
76°
70°
1
72°
66°
2
72°
64°
3
74°
68°
4
76°
66°
5
70°
64°
6
67°
57°
7
66°
55°
8
67°
58°
9
68°
61°
10
67°
60°
11
70°
58°
12
66°
57°
13
69°
56°
14
68°
59°
15
70°
64°
16
65°
53°
17
65°
52°
18
67°
57°
19
64°
55°
20
61°
52°
21
59°
51°
22
59°
51°
23
62°
52°
24
60°
50°
25
61°
51°
26
64°
51°
27
63°
52°
28
62°
53°
29
61°
58°
30
69°
57°
31
68°
59°
1
61°
49°
2
64°
46°
3
64°
60°
4
63°
59°
5
61°
58°
6
64°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Helsinki
Helsinki's August 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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.
