S
M
T
W
T
F
S
30
66°
47°
31
65°
45°
1
65°
45°
2
66°
46°
3
67°
48°
4
66°
48°
5
64°
47°
6
63°
46°
7
62°
45°
8
63°
43°
9
63°
43°
10
67°
47°
11
61°
43°
12
67°
42°
13
65°
42°
14
67°
49°
15
67°
48°
16
66°
47°
17
68°
46°
18
68°
42°
19
69°
48°
20
69°
48°
21
68°
41°
22
66°
43°
23
60°
39°
24
59°
40°
25
58°
41°
26
63°
38°
27
59°
36°
28
54°
37°
29
53°
37°
30
55°
39°
1
55°
36°
2
Hist. Avg.
58°
40°
3
Hist. Avg.
58°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Shawinigan
Shawinigan's September 2026 forecast shows daily high temperatures ranging from 53° to 69°, with overnight lows between 36° and 49°. The average high for September is 63° with an average low of 43°. 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 Shawinigan. See also: October | November | December.
