S
M
T
W
T
F
S
30
74°
56°
31
74°
52°
1
73°
51°
2
69°
55°
3
67°
52°
4
73°
49°
5
66°
48°
6
66°
54°
7
71°
54°
8
71°
53°
9
72°
54°
10
71°
52°
11
70°
51°
12
70°
50°
13
69°
52°
14
70°
52°
15
70°
50°
16
68°
46°
17
62°
48°
18
63°
50°
19
68°
50°
20
67°
48°
21
67°
48°
22
60°
47°
23
64°
48°
24
65°
47°
25
61°
47°
26
59°
43°
27
58°
47°
28
64°
44°
29
61°
42°
30
56°
41°
1
58°
44°
2
58°
40°
3
56°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fredericton
Fredericton's September 2026 forecast shows daily high temperatures ranging from 56° to 74°, with overnight lows between 39° and 56°. The average high for September is 66° with an average low of 49°. 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 Fredericton. See also: October | November | December.
