S
M
T
W
T
F
S
26
59°
30°
27
61°
26°
28
64°
31°
29
55°
37°
30
60°
39°
1
54°
44°
2
62°
40°
3
48°
33°
4
60°
35°
5
74°
41°
6
67°
51°
7
60°
42°
8
57°
37°
9
59°
36°
10
62°
45°
11
63°
47°
12
53°
39°
13
62°
37°
14
66°
45°
15
50°
45°
16
74°
55°
17
75°
42°
18
68°
45°
19
77°
50°
20
78°
55°
21
64°
42°
22
60°
41°
23
61°
42°
24
63°
44°
25
64°
46°
26
66°
49°
27
67°
54°
28
61°
43°
29
61°
46°
30
62°
47°
31
60°
47°
1
61°
48°
2
64°
47°
3
63°
46°
4
61°
46°
5
61°
47°
6
62°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Dieppe
Dieppe's May 2026 forecast shows daily high temperatures ranging from 50° to 78°, with overnight lows between 41° and 55°. The average high for May is 65° with an average low of 47°. 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 Dieppe. See also: June | July | August.