S
M
T
W
T
F
S
30
76°
51°
31
72°
52°
1
69°
48°
2
70°
49°
3
69°
50°
4
69°
59°
5
60°
54°
6
55°
49°
7
62°
49°
8
62°
46°
9
62°
41°
10
78°
55°
11
62°
47°
12
69°
43°
13
69°
47°
14
75°
47°
15
68°
46°
16
72°
47°
17
66°
53°
18
70°
47°
19
62°
43°
20
61°
35°
21
63°
44°
22
60°
37°
23
62°
35°
24
71°
38°
25
71°
40°
26
67°
45°
27
64°
48°
28
58°
47°
29
60°
53°
30
61°
47°
1
73°
46°
2
66°
45°
3
62°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Moncton
Moncton's September 2026 forecast shows daily high temperatures ranging from 62° to 66°, with overnight lows between 36° and 45°. The average high for September is 64° with an average low of 41°. 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 Moncton. See also: October | November | December.
