S
M
T
W
T
F
S
30
72°
67°
31
73°
69°
1
74°
72°
2
76°
71°
3
77°
71°
4
74°
66°
5
75°
63°
6
74°
62°
7
75°
60°
8
76°
66°
9
78°
73°
10
76°
65°
11
71°
59°
12
75°
64°
13
79°
65°
14
67°
56°
15
75°
61°
16
78°
62°
17
74°
55°
18
70°
53°
19
63°
55°
20
66°
49°
21
64°
52°
22
65°
53°
23
71°
55°
24
64°
50°
25
68°
50°
26
70°
52°
27
71°
53°
28
68°
51°
29
67°
41°
30
66°
54°
1
68°
55°
2
62°
53°
3
60°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Welland
Welland's September 2026 forecast shows daily high temperatures ranging from 60° to 78°, with overnight lows between 41° and 62°. The average high for September is 68° with an average low of 53°. 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 Welland. See also: October | November | December.
