S
M
T
W
T
F
S
26
84°
70°
27
85°
70°
28
87°
71°
29
88°
70°
30
89°
68°
31
85°
64°
1
81°
68°
2
83°
70°
3
86°
70°
4
85°
68°
5
89°
70°
6
87°
71°
7
88°
69°
8
84°
67°
9
85°
68°
10
85°
64°
11
85°
68°
12
89°
70°
13
91°
69°
14
90°
70°
15
89°
69°
16
91°
70°
17
90°
63°
18
89°
61°
19
84°
60°
20
82°
60°
21
82°
61°
22
83°
61°
23
83°
62°
24
84°
62°
25
87°
63°
26
86°
61°
27
89°
61°
28
84°
60°
29
83°
60°
30
83°
61°
31
86°
62°
1
87°
61°
2
82°
60°
3
82°
66°
4
88°
65°
5
87°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Lamar
Lamar's August 2026 forecast shows daily high temperatures ranging from 81° to 91°, with overnight lows between 60° and 71°. The average high for August is 86° with an average low of 65°. 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 Lamar. See also: September | October | November.