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
N/A
4
64°
51°
5
56°
50°
6
61°
44°
7
62°
45°
8
65°
52°
9
65°
51°
10
65°
47°
11
62°
45°
12
60°
47°
13
62°
50°
14
61°
48°
15
60°
47°
16
60°
45°
17
61°
49°
18
61°
49°
19
62°
48°
20
61°
48°
21
61°
46°
22
62°
46°
23
62°
47°
24
63°
50°
25
63°
50°
26
64°
53°
27
63°
51°
28
63°
48°
29
64°
49°
30
67°
53°
31
70°
54°
1
70°
54°
2
69°
53°
3
71°
55°
4
70°
54°
5
68°
55°
6
65°
55°
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 56° to 71°, with overnight lows between 44° and 55°. The average high for May is 64° with an average low of 50°. 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.
