S
M
T
W
T
F
S
26
87°
68°
27
88°
68°
28
89°
67°
29
88°
69°
30
89°
68°
31
87°
67°
1
82°
66°
2
81°
63°
3
81°
64°
4
80°
66°
5
81°
66°
6
82°
65°
7
82°
64°
8
83°
64°
9
84°
66°
10
85°
66°
11
85°
65°
12
86°
66°
13
86°
65°
14
89°
65°
15
90°
66°
16
88°
66°
17
82°
65°
18
86°
66°
19
84°
61°
20
83°
58°
21
81°
57°
22
79°
57°
23
81°
58°
24
81°
57°
25
82°
58°
26
81°
64°
27
85°
61°
28
85°
60°
29
82°
60°
30
84°
58°
31
80°
57°
1
78°
59°
2
80°
62°
3
79°
57°
4
79°
55°
5
81°
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 78° to 90°, with overnight lows between 55° and 69°. The average high for August is 83° with an average low of 63°. 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.
