S
M
T
W
T
F
S
30
92°
73°
31
93°
75°
1
93°
75°
2
94°
73°
3
95°
73°
4
83°
73°
5
92°
72°
6
94°
72°
7
94°
76°
8
95°
74°
9
95°
72°
10
90°
72°
11
88°
71°
12
93°
70°
13
95°
72°
14
92°
71°
15
94°
72°
16
94°
74°
17
91°
69°
18
92°
66°
19
94°
67°
20
94°
70°
21
94°
73°
22
93°
69°
23
95°
70°
24
88°
68°
25
88°
65°
26
N/A
27
90°
64°
28
92°
66°
29
92°
65°
30
92°
66°
1
90°
73°
2
92°
73°
3
76°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Summit
Summit'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 Summit. See also: October | November | December.
