S
M
T
W
T
F
S
30
83°
60°
31
87°
69°
1
92°
70°
2
93°
71°
3
93°
68°
4
85°
63°
5
81°
59°
6
84°
60°
7
86°
61°
8
84°
61°
9
82°
60°
10
79°
57°
11
79°
54°
12
76°
54°
13
78°
53°
14
79°
58°
15
79°
58°
16
76°
57°
17
77°
54°
18
72°
50°
19
76°
55°
20
79°
57°
21
79°
57°
22
78°
56°
23
80°
56°
24
79°
55°
25
78°
54°
26
77°
53°
27
78°
54°
28
77°
54°
29
76°
53°
30
75°
51°
1
74°
50°
2
75°
50°
3
75°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Dennison
Dennison's September 2026 forecast shows daily high temperatures ranging from 72° to 93°, with overnight lows between 50° and 71°. The average high for September is 80° with an average low of 57°. 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 Dennison. See also: October | November | December.
