S
M
T
W
T
F
S
26
75°
45°
27
73°
46°
28
66°
43°
29
73°
48°
30
75°
57°
1
73°
54°
2
63°
52°
3
68°
52°
4
63°
48°
5
55°
50°
6
61°
50°
7
63°
48°
8
72°
50°
9
73°
54°
10
59°
52°
11
59°
45°
12
63°
43°
13
59°
45°
14
57°
45°
15
59°
41°
16
59°
41°
17
61°
52°
18
61°
53°
19
67°
53°
20
70°
49°
21
79°
56°
22
85°
60°
23
72°
54°
24
77°
58°
25
77°
55°
26
78°
57°
27
78°
57°
28
77°
56°
29
78°
56°
30
77°
55°
31
63°
50°
1
63°
52°
2
64°
49°
3
64°
52°
4
67°
53°
5
70°
55°
6
71°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Rennes
Rennes's May 2026 forecast shows daily high temperatures ranging from 61° to 85°, with overnight lows between 49° and 60°. The average high for May is 72° with an average low of 54°. 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 Rennes. See also: June | July | August.
