S
M
T
W
T
F
S
27
51°
34°
28
44°
41°
29
53°
42°
30
41°
38°
1
42°
38°
2
49°
40°
3
49°
41°
4
46°
36°
5
46°
34°
6
45°
38°
7
43°
36°
8
44°
37°
9
46°
40°
10
48°
38°
11
51°
42°
12
51°
43°
13
52°
43°
14
49°
41°
15
54°
41°
16
58°
44°
17
48°
42°
18
61°
46°
19
55°
47°
20
62°
47°
21
51°
46°
22
52°
48°
23
51°
46°
24
52°
46°
25
53°
46°
26
52°
48°
27
56°
46°
28
54°
50°
29
68°
52°
30
69°
53°
31
62°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Helsinki
Helsinki's May 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May 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 May weather will actually feel in Helsinki. See also: June | July | August.
