S
M
T
W
T
F
S
30
78°
53°
31
78°
46°
1
74°
46°
2
75°
51°
3
77°
45°
4
75°
41°
5
72°
42°
6
71°
44°
7
74°
43°
8
75°
45°
9
75°
42°
10
74°
43°
11
72°
43°
12
71°
42°
13
73°
47°
14
75°
48°
15
Hist. Avg.
84°
41°
16
Hist. Avg.
83°
41°
17
Hist. Avg.
83°
41°
18
Hist. Avg.
82°
40°
19
Hist. Avg.
82°
40°
20
Hist. Avg.
82°
40°
21
Hist. Avg.
81°
39°
22
Hist. Avg.
81°
39°
23
Hist. Avg.
80°
38°
24
Hist. Avg.
80°
38°
25
Hist. Avg.
79°
38°
26
Hist. Avg.
79°
37°
27
Hist. Avg.
78°
37°
28
Hist. Avg.
78°
36°
29
Hist. Avg.
77°
36°
30
Hist. Avg.
77°
36°
1
Hist. Avg.
76°
35°
2
Hist. Avg.
76°
35°
3
Hist. Avg.
75°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Summit Lake
Summit Lake's September 2026 forecast shows daily high temperatures ranging from 71° to 78°, with overnight lows between 41° and 53°. The average high for September is 74° with an average low of 45°. 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 Lake. See also: October | November | December.
