S
M
T
W
T
F
S
30
89°
64°
31
92°
64°
1
88°
59°
2
88°
64°
3
88°
70°
4
93°
69°
5
83°
65°
6
79°
64°
7
83°
64°
8
84°
66°
9
82°
55°
10
81°
50°
11
84°
62°
12
76°
48°
13
64°
47°
14
67°
54°
15
68°
49°
16
66°
54°
17
72°
49°
18
69°
52°
19
68°
48°
20
69°
50°
21
74°
55°
22
73°
54°
23
74°
52°
24
69°
42°
25
74°
53°
26
74°
52°
27
73°
52°
28
72°
51°
29
68°
50°
30
71°
49°
1
63°
48°
2
67°
48°
3
66°
47°
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 63° to 84°, with overnight lows between 42° and 62°. The average high for September is 70° 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 Dennison. See also: October | November | December.
