S
M
T
W
T
F
S
30
72°
54°
31
73°
50°
1
71°
44°
2
63°
47°
3
62°
54°
4
67°
53°
5
69°
47°
6
70°
43°
7
63°
43°
8
65°
47°
9
68°
50°
10
67°
50°
11
67°
48°
12
66°
46°
13
63°
46°
14
58°
48°
15
57°
43°
16
57°
40°
17
58°
47°
18
59°
40°
19
57°
46°
20
56°
49°
21
62°
46°
22
63°
39°
23
55°
40°
24
54°
39°
25
51°
39°
26
51°
37°
27
Hist. Avg.
57°
39°
28
Hist. Avg.
56°
38°
29
Hist. Avg.
56°
38°
30
Hist. Avg.
56°
38°
1
Hist. Avg.
55°
38°
2
Hist. Avg.
55°
37°
3
Hist. Avg.
54°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Rimouski
Rimouski's September 2026 forecast shows daily high temperatures ranging from 51° to 73°, with overnight lows between 37° and 54°. The average high for September is 62° with an average low of 46°. 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 Rimouski. See also: October | November | December.
