S
M
T
W
T
F
S
26
60°
38°
27
61°
37°
28
63°
39°
29
64°
41°
30
64°
41°
1
65°
42°
2
65°
42°
3
66°
41°
4
62°
42°
5
65°
43°
6
66°
41°
7
56°
31°
8
53°
31°
9
57°
37°
10
65°
43°
11
65°
41°
12
62°
42°
13
68°
45°
14
69°
44°
15
67°
40°
16
67°
44°
17
68°
45°
18
68°
41°
19
62°
39°
20
61°
37°
21
59°
40°
22
61°
39°
23
60°
38°
24
62°
45°
25
72°
46°
26
71°
48°
27
72°
49°
28
73°
48°
29
67°
46°
30
69°
46°
31
73°
47°
1
72°
48°
2
70°
44°
3
70°
42°
4
69°
42°
5
65°
44°
6
65°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Rheinfeld
Rheinfeld's May 2026 forecast shows daily high temperatures ranging from 53° to 73°, with overnight lows between 31° and 49°. The average high for May is 65° with an average low of 42°. 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 Rheinfeld. See also: June | July | August.