S
M
T
W
T
F
S
26
86°
65°
27
86°
64°
28
87°
65°
29
87°
65°
30
90°
68°
31
91°
70°
1
91°
69°
2
87°
70°
3
90°
70°
4
93°
69°
5
92°
64°
6
89°
64°
7
85°
65°
8
84°
63°
9
86°
63°
10
86°
64°
11
87°
65°
12
88°
64°
13
89°
69°
14
91°
68°
15
89°
66°
16
90°
66°
17
92°
63°
18
85°
62°
19
85°
67°
20
87°
68°
21
91°
67°
22
90°
68°
23
91°
69°
24
92°
69°
25
92°
68°
26
91°
68°
27
91°
69°
28
90°
69°
29
90°
67°
30
89°
68°
31
87°
65°
1
86°
64°
2
86°
63°
3
85°
64°
4
87°
64°
5
87°
64°
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 84° to 93°, with overnight lows between 62° and 70°. The average high for August is 89° with an average low of 66°. 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.