S
M
T
W
T
F
S
30
81°
60°
31
82°
61°
1
81°
60°
2
81°
61°
3
82°
58°
4
81°
53°
5
79°
59°
6
79°
60°
7
80°
59°
8
Hist. Avg.
78°
58°
9
Hist. Avg.
77°
57°
10
Hist. Avg.
77°
57°
11
Hist. Avg.
77°
57°
12
Hist. Avg.
76°
56°
13
Hist. Avg.
76°
56°
14
Hist. Avg.
76°
56°
15
Hist. Avg.
75°
55°
16
Hist. Avg.
75°
55°
17
Hist. Avg.
74°
54°
18
Hist. Avg.
74°
54°
19
Hist. Avg.
74°
54°
20
Hist. Avg.
73°
53°
21
Hist. Avg.
73°
53°
22
Hist. Avg.
72°
52°
23
Hist. Avg.
72°
52°
24
Hist. Avg.
72°
52°
25
Hist. Avg.
71°
51°
26
Hist. Avg.
71°
51°
27
Hist. Avg.
70°
50°
28
Hist. Avg.
70°
50°
29
Hist. Avg.
70°
49°
30
Hist. Avg.
69°
49°
1
Hist. Avg.
69°
49°
2
Hist. Avg.
68°
48°
3
Hist. Avg.
68°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Danbury
Danbury's September 2026 forecast shows daily high temperatures ranging from 79° to 82°, with overnight lows between 53° and 61°. The average high for September is 81° with an average low of 59°. 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 Danbury. See also: October | November | December.
