S
M
T
W
T
F
S
30
76°
51°
31
75°
54°
1
75°
47°
2
74°
48°
3
67°
53°
4
73°
52°
5
73°
53°
6
74°
46°
7
72°
44°
8
66°
46°
9
71°
51°
10
71°
52°
11
72°
50°
12
71°
50°
13
65°
49°
14
65°
49°
15
64°
45°
16
65°
43°
17
64°
48°
18
66°
44°
19
63°
42°
20
62°
49°
21
67°
47°
22
66°
42°
23
66°
40°
24
60°
47°
25
61°
46°
26
61°
42°
27
65°
44°
28
60°
41°
29
61°
45°
30
Hist. Avg.
60°
40°
1
Hist. Avg.
60°
40°
2
Hist. Avg.
59°
40°
3
Hist. Avg.
59°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Dieppe
Dieppe's September 2026 forecast shows daily high temperatures ranging from 60° to 76°, with overnight lows between 40° and 54°. The average high for September is 67° 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 September weather will actually feel in Dieppe. See also: October | November | December.
