S
M
T
W
T
F
S
26
70°
36°
27
59°
47°
28
59°
43°
29
66°
32°
30
70°
41°
31
74°
36°
1
77°
47°
2
71°
46°
3
61°
53°
4
62°
55°
5
66°
50°
6
62°
49°
7
64°
47°
8
65°
46°
9
70°
43°
10
69°
44°
11
69°
46°
12
65°
48°
13
68°
47°
14
68°
49°
15
63°
44°
16
61°
43°
17
62°
44°
18
60°
41°
19
55°
43°
20
55°
41°
21
56°
40°
22
53°
41°
23
53°
39°
24
54°
40°
25
53°
40°
26
53°
38°
27
52°
36°
28
53°
41°
29
52°
41°
30
53°
42°
31
52°
40°
1
51°
39°
2
51°
38°
3
52°
37°
4
50°
38°
5
49°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Summit
Summit's August 2026 forecast shows daily high temperatures ranging from 49° to 70°, with overnight lows between 36° and 50°. The average high for August is 58° with an average low of 42°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Summit. See also: September | October | November.
