S
M
T
W
T
F
S
26
59°
37°
27
61°
43°
28
59°
43°
29
57°
41°
30
59°
37°
1
64°
43°
2
70°
52°
3
66°
52°
4
64°
50°
5
59°
50°
6
52°
43°
7
52°
41°
8
55°
41°
9
61°
41°
10
64°
48°
11
52°
34°
12
45°
34°
13
N/A
14
51°
37°
15
55°
38°
16
55°
38°
17
59°
45°
18
57°
42°
19
63°
49°
20
67°
51°
21
69°
53°
22
71°
52°
23
68°
50°
24
67°
50°
25
69°
51°
26
61°
53°
27
59°
47°
28
60°
46°
29
60°
47°
30
61°
46°
31
62°
48°
1
62°
47°
2
68°
52°
3
70°
56°
4
72°
57°
5
72°
57°
6
71°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Siegen
Siegen's May 2026 forecast shows daily high temperatures ranging from 51° to 72°, with overnight lows between 37° and 57°. The average high for May is 64° with an average low of 49°. 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 Siegen. See also: June | July | August.
