S
M
T
W
T
F
S
26
86°
64°
27
87°
65°
28
86°
65°
29
84°
64°
30
78°
63°
31
79°
61°
1
78°
62°
2
78°
61°
3
79°
61°
4
80°
62°
5
79°
60°
6
78°
57°
7
79°
58°
8
80°
59°
9
81°
63°
10
79°
63°
11
81°
61°
12
82°
61°
13
82°
62°
14
83°
62°
15
81°
59°
16
78°
56°
17
78°
57°
18
79°
56°
19
78°
57°
20
84°
62°
21
81°
54°
22
77°
52°
23
76°
54°
24
79°
55°
25
78°
54°
26
84°
58°
27
85°
61°
28
86°
62°
29
87°
60°
30
86°
53°
31
78°
56°
1
78°
60°
2
77°
56°
3
82°
54°
4
83°
60°
5
85°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Sycamore
Sycamore's August 2026 forecast shows daily high temperatures ranging from 76° to 87°, with overnight lows between 52° and 65°. The average high for August 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 August weather will actually feel in Sycamore. See also: September | October | November.
