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