S
M
T
W
T
F
S
30
68°
49°
31
69°
47°
1
67°
46°
2
66°
45°
3
67°
46°
4
68°
48°
5
68°
52°
6
67°
46°
7
66°
45°
8
65°
46°
9
65°
44°
10
66°
49°
11
67°
47°
12
65°
45°
13
66°
44°
14
66°
43°
15
64°
42°
16
64°
42°
17
64°
43°
18
66°
46°
19
68°
50°
20
65°
48°
21
69°
48°
22
68°
47°
23
65°
44°
24
66°
42°
25
59°
40°
26
62°
41°
27
65°
39°
28
59°
38°
29
57°
37°
30
56°
37°
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
September Weather in Dieppe
Dieppe's September 2026 forecast shows daily high temperatures ranging from 56° to 69°, with overnight lows between 37° and 52°. The average high for September is 65° with an average low of 45°. 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.
