S
M
T
W
T
F
S
30
84°
65°
31
79°
61°
1
71°
59°
2
76°
60°
3
80°
62°
4
76°
62°
5
84°
66°
6
79°
64°
7
68°
64°
8
76°
58°
9
71°
55°
10
75°
58°
11
72°
56°
12
68°
53°
13
72°
56°
14
72°
55°
15
70°
52°
16
75°
51°
17
71°
52°
18
72°
52°
19
71°
49°
20
63°
46°
21
68°
49°
22
64°
47°
23
64°
48°
24
68°
48°
25
62°
44°
26
55°
40°
27
54°
37°
28
54°
42°
29
64°
38°
30
52°
40°
1
53°
41°
2
51°
40°
3
61°
41°
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 51° to 84°, with overnight lows between 37° and 66°. The average high for September is 67° with an average low of 51°. 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.
