S
M
T
W
T
F
S
26
49°
28°
27
52°
26°
28
49°
31°
29
47°
30°
30
51°
29°
1
60°
35°
2
68°
40°
3
66°
43°
4
60°
46°
5
55°
43°
6
51°
39°
7
41°
36°
8
48°
35°
9
52°
41°
10
58°
39°
11
48°
31°
12
39°
29°
13
44°
35°
14
47°
32°
15
50°
34°
16
50°
35°
17
55°
38°
18
57°
41°
19
57°
47°
20
61°
47°
21
61°
46°
22
65°
48°
23
66°
50°
24
66°
50°
25
67°
48°
26
65°
49°
27
56°
44°
28
55°
45°
29
56°
44°
30
57°
44°
31
57°
45°
1
58°
44°
2
61°
50°
3
66°
52°
4
67°
54°
5
68°
54°
6
68°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Clausthal-Zellerfeld
Clausthal-Zellerfeld's May 2026 forecast shows daily high temperatures ranging from 47° to 68°, with overnight lows between 32° and 54°. The average high for May is 60° with an average low of 46°. 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 Clausthal-Zellerfeld. See also: June | July | August.