S
M
T
W
T
F
S
26
66°
37°
27
68°
39°
28
70°
43°
29
66°
48°
30
63°
41°
1
73°
41°
2
77°
41°
3
75°
48°
4
72°
50°
5
68°
52°
6
64°
46°
7
N/A
8
68°
43°
9
73°
49°
10
74°
54°
11
64°
43°
12
59°
41°
13
61°
47°
14
59°
46°
15
58°
44°
16
61°
46°
17
60°
48°
18
62°
47°
19
65°
48°
20
64°
47°
21
68°
50°
22
71°
50°
23
64°
50°
24
66°
56°
25
73°
56°
26
75°
57°
27
75°
57°
28
73°
58°
29
73°
57°
30
70°
58°
31
74°
58°
1
75°
57°
2
76°
58°
3
77°
58°
4
76°
59°
5
76°
59°
6
75°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Rietenau
Rietenau's May 2026 forecast shows daily high temperatures ranging from 58° to 77°, with overnight lows between 41° and 59°. The average high for May is 69° with an average low of 52°. 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 Rietenau. See also: June | July | August.