S
M
T
W
T
F
S
26
96°
68°
27
91°
67°
28
90°
67°
29
90°
70°
30
81°
70°
31
75°
61°
1
83°
56°
2
84°
61°
3
87°
60°
4
68°
53°
5
77°
55°
6
82°
55°
7
74°
58°
8
81°
54°
9
81°
59°
10
80°
55°
11
83°
62°
12
84°
64°
13
77°
63°
14
75°
67°
15
80°
60°
16
76°
56°
17
81°
62°
18
80°
59°
19
82°
61°
20
84°
59°
21
80°
57°
22
80°
58°
23
79°
54°
24
76°
56°
25
80°
55°
26
83°
62°
27
83°
60°
28
82°
61°
29
84°
62°
30
84°
62°
31
83°
61°
1
83°
60°
2
82°
61°
3
84°
61°
4
84°
60°
5
83°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Lake Poinsett
Lake Poinsett's August 2026 forecast shows daily high temperatures ranging from 75° to 84°, with overnight lows between 54° and 67°. The average high for August is 81° 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 Lake Poinsett. See also: September | October | November.