S
M
T
W
T
F
S
26
78°
62°
27
79°
57°
28
77°
56°
29
78°
58°
30
82°
60°
31
78°
58°
1
79°
61°
2
82°
62°
3
83°
57°
4
77°
56°
5
78°
55°
6
77°
58°
7
77°
58°
8
76°
55°
9
78°
60°
10
81°
60°
11
76°
61°
12
80°
61°
13
79°
60°
14
78°
61°
15
82°
61°
16
83°
54°
17
76°
54°
18
76°
57°
19
75°
56°
20
75°
53°
21
76°
53°
22
76°
55°
23
81°
57°
24
82°
59°
25
81°
58°
26
81°
53°
27
78°
51°
28
74°
50°
29
73°
52°
30
75°
53°
31
78°
57°
1
79°
57°
2
79°
56°
3
78°
54°
4
78°
57°
5
77°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Barnum
Barnum's August 2026 forecast shows daily high temperatures ranging from 73° to 83°, with overnight lows between 50° and 62°. The average high for August is 78° with an average low of 57°. 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 Barnum. See also: September | October | November.