S
M
T
W
T
F
S
30
88°
66°
31
88°
63°
1
88°
63°
2
87°
66°
3
88°
69°
4
91°
70°
5
82°
68°
6
73°
64°
7
78°
63°
8
81°
68°
9
82°
57°
10
81°
51°
11
83°
58°
12
73°
51°
13
69°
47°
14
62°
52°
15
71°
52°
16
74°
47°
17
68°
61°
18
69°
61°
19
62°
59°
20
65°
56°
21
55°
48°
22
57°
48°
23
63°
51°
24
60°
54°
25
64°
56°
26
64°
55°
27
72°
57°
28
70°
49°
29
67°
48°
30
69°
49°
1
71°
50°
2
67°
43°
3
63°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Dunnell
Dunnell's September 2026 forecast shows daily high temperatures ranging from 55° to 72°, with overnight lows between 43° and 57°. The average high for September is 65° 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 Dunnell. See also: October | November | December.