S
M
T
W
T
F
S
30
71°
65°
31
69°
65°
1
75°
65°
2
85°
67°
3
83°
69°
4
77°
67°
5
72°
65°
6
69°
64°
7
N/A
8
74°
67°
9
80°
65°
10
76°
56°
11
71°
58°
12
78°
61°
13
79°
60°
14
74°
61°
15
76°
58°
16
72°
53°
17
67°
52°
18
65°
50°
19
64°
51°
20
66°
52°
21
64°
49°
22
63°
53°
23
65°
54°
24
67°
54°
25
71°
53°
26
71°
52°
27
64°
52°
28
70°
53°
29
71°
55°
30
71°
54°
1
70°
54°
2
68°
50°
3
67°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Oakville
Oakville's September 2026 forecast shows daily high temperatures ranging from 63° to 80°, with overnight lows between 46° and 67°. The average high for September is 70° with an average low of 55°. 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 Oakville. See also: October | November | December.
