S
M
T
W
T
F
S
26
85°
58°
27
83°
63°
28
78°
56°
29
83°
52°
30
85°
58°
31
71°
60°
1
82°
59°
2
77°
55°
3
80°
51°
4
75°
56°
5
76°
51°
6
82°
55°
7
86°
59°
8
82°
58°
9
83°
57°
10
74°
55°
11
78°
56°
12
75°
55°
13
77°
56°
14
77°
57°
15
76°
54°
16
79°
58°
17
78°
55°
18
81°
60°
19
80°
59°
20
81°
60°
21
81°
61°
22
80°
61°
23
81°
60°
24
80°
60°
25
79°
59°
26
78°
58°
27
74°
58°
28
77°
59°
29
79°
58°
30
80°
59°
31
80°
58°
1
78°
57°
2
76°
57°
3
79°
58°
4
79°
58°
5
78°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Birnamwood
Birnamwood's August 2026 forecast shows daily high temperatures ranging from 74° to 86°, with overnight lows between 51° and 61°. The average high for August is 79° with an average low of 58°. 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 Birnamwood. See also: September | October | November.