S
M
T
W
T
F
S
30
70°
52°
31
72°
53°
1
69°
48°
2
76°
44°
3
70°
46°
4
74°
51°
5
72°
51°
6
65°
52°
7
66°
50°
8
72°
43°
9
71°
50°
10
73°
52°
11
73°
47°
12
69°
42°
13
66°
45°
14
66°
52°
15
71°
41°
16
72°
43°
17
61°
41°
18
57°
39°
19
58°
37°
20
58°
40°
21
61°
41°
22
58°
37°
23
59°
35°
24
55°
34°
25
56°
37°
26
55°
38°
27
57°
37°
28
56°
44°
29
56°
34°
30
59°
39°
1
Hist. Avg.
59°
37°
2
Hist. Avg.
58°
37°
3
Hist. Avg.
58°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Winnipeg
Winnipeg's September 2026 forecast shows daily high temperatures ranging from 55° to 76°, with overnight lows between 34° and 53°. The average high for September is 65° with an average low of 44°. 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 Winnipeg. See also: October | November | December.
