S
M
T
W
T
F
S
30
72°
66°
31
70°
66°
1
85°
68°
2
84°
65°
3
80°
58°
4
79°
56°
5
74°
56°
6
75°
58°
7
75°
54°
8
72°
55°
9
75°
59°
10
73°
55°
11
70°
53°
12
71°
51°
13
69°
51°
14
70°
49°
15
70°
54°
16
74°
54°
17
73°
50°
18
66°
49°
19
70°
53°
20
73°
55°
21
73°
55°
22
74°
54°
23
74°
53°
24
72°
52°
25
72°
51°
26
71°
51°
27
72°
52°
28
72°
50°
29
69°
49°
30
64°
48°
1
65°
49°
2
69°
50°
3
69°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kleinburg
Kleinburg's September 2026 forecast shows daily high temperatures ranging from 64° to 85°, with overnight lows between 48° and 68°. The average high for September is 73° with an average low of 54°. 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 Kleinburg. See also: October | November | December.
