S
M
T
W
T
F
S
26
87°
69°
27
88°
69°
28
87°
70°
29
87°
70°
30
88°
71°
31
88°
72°
1
90°
71°
2
89°
72°
3
92°
72°
4
91°
73°
5
92°
73°
6
92°
72°
7
91°
72°
8
92°
71°
9
92°
72°
10
90°
72°
11
89°
71°
12
90°
72°
13
92°
72°
14
92°
71°
15
91°
72°
16
91°
70°
17
91°
71°
18
92°
70°
19
91°
71°
20
92°
69°
21
91°
70°
22
90°
69°
23
92°
70°
24
91°
67°
25
88°
64°
26
87°
64°
27
86°
65°
28
86°
63°
29
87°
63°
30
86°
64°
31
87°
63°
1
86°
63°
2
85°
64°
3
90°
65°
4
90°
67°
5
89°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Weir
Weir's August 2026 forecast shows daily high temperatures ranging from 85° to 92°, with overnight lows between 63° and 73°. The average high for August is 89° with an average low of 69°. 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 Weir. See also: September | October | November.