S
M
T
W
T
F
S
31
74°
51°
1
73°
50°
2
90°
42°
3
93°
40°
4
75°
41°
5
69°
37°
6
77°
37°
7
71°
46°
8
67°
45°
9
74°
34°
10
74°
37°
11
80°
36°
12
77°
36°
13
75°
45°
14
79°
46°
15
74°
42°
16
76°
36°
17
79°
51°
18
67°
36°
19
73°
27°
20
74°
38°
21
59°
37°
22
65°
31°
23
76°
46°
24
62°
36°
25
54°
24°
26
60°
24°
27
55°
37°
28
60°
37°
29
62°
45°
30
60°
41°
1
58°
42°
2
58°
40°
3
56°
25°
4
48°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Miramichi
Miramichi's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Miramichi. See also: October | November | December.