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
59°
46°
19
64°
54°
20
66°
54°
21
77°
48°
22
86°
59°
23
88°
61°
24
N/A
25
93°
65°
26
93°
63°
27
94°
60°
28
92°
60°
29
82°
59°
30
85°
58°
31
77°
58°
1
75°
57°
2
76°
56°
3
74°
56°
4
74°
52°
5
72°
53°
6
64°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Rennes
Rennes's May 2026 forecast shows daily high temperatures ranging from 64° to 94°, with overnight lows between 48° and 65°. The average high for May is 81° with an average low of 57°. 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.
