S
M
T
W
T
F
S
26
40°
28°
27
41°
29°
28
41°
30°
29
42°
30°
30
43°
31°
1
44°
31°
2
47°
35°
3
53°
36°
4
45°
35°
5
51°
39°
6
54°
39°
7
56°
41°
8
53°
42°
9
50°
38°
10
48°
37°
11
54°
38°
12
58°
41°
13
60°
44°
14
59°
44°
15
56°
39°
16
51°
39°
17
52°
43°
18
62°
34°
19
55°
34°
20
55°
33°
21
56°
39°
22
56°
39°
23
57°
44°
24
64°
45°
25
61°
48°
26
68°
48°
27
63°
47°
28
64°
44°
29
61°
48°
30
61°
45°
31
59°
46°
1
63°
47°
2
66°
43°
3
60°
41°
4
60°
40°
5
61°
41°
6
61°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Joensuu
Joensuu's May 2026 forecast shows daily high temperatures ranging from 40° to 68°, with overnight lows between 28° and 50°. The average high for May is 55° with an average low of 40°. 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 Joensuu. See also: June | July | August.
