S
M
T
W
T
F
S
26
89°
69°
27
89°
68°
28
90°
68°
29
91°
69°
30
94°
72°
31
94°
73°
1
92°
73°
2
90°
72°
3
90°
74°
4
93°
72°
5
91°
69°
6
95°
68°
7
89°
68°
8
89°
69°
9
90°
69°
10
90°
70°
11
92°
70°
12
91°
69°
13
90°
73°
14
92°
72°
15
89°
71°
16
90°
71°
17
89°
70°
18
89°
68°
19
90°
73°
20
89°
73°
21
92°
74°
22
94°
73°
23
94°
73°
24
95°
74°
25
95°
73°
26
94°
73°
27
93°
72°
28
93°
73°
29
91°
73°
30
92°
71°
31
90°
70°
1
89°
69°
2
89°
69°
3
90°
68°
4
90°
71°
5
90°
70°
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 89° to 95°, with overnight lows between 68° and 74°. The average high for August is 91° with an average low of 71°. 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.