S
M
T
W
T
F
S
30
93°
74°
31
92°
75°
1
91°
75°
2
95°
77°
3
97°
78°
4
94°
76°
5
93°
74°
6
91°
75°
7
96°
74°
8
90°
78°
9
90°
77°
10
90°
73°
11
90°
75°
12
94°
76°
13
90°
74°
14
92°
76°
15
94°
75°
16
92°
78°
17
88°
78°
18
92°
72°
19
93°
71°
20
93°
70°
21
92°
76°
22
92°
76°
23
93°
76°
24
92°
76°
25
93°
67°
26
90°
66°
27
93°
67°
28
89°
77°
29
90°
69°
30
93°
76°
1
93°
78°
2
93°
75°
3
86°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Danbury
Danbury's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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.
