S
M
T
W
T
F
S
26
98°
61°
27
96°
58°
28
97°
58°
29
97°
60°
30
99°
59°
31
98°
57°
1
103°
61°
2
104°
63°
3
105°
63°
4
102°
66°
5
99°
61°
6
100°
59°
7
105°
62°
8
98°
62°
9
103°
62°
10
91°
61°
11
92°
59°
12
89°
60°
13
78°
59°
14
81°
59°
15
86°
57°
16
88°
58°
17
89°
59°
18
90°
61°
19
89°
60°
20
91°
60°
21
93°
61°
22
97°
61°
23
100°
62°
24
104°
56°
25
90°
58°
26
93°
60°
27
94°
61°
28
94°
61°
29
91°
59°
30
94°
60°
31
95°
60°
1
96°
61°
2
95°
60°
3
89°
60°
4
89°
59°
5
92°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Allendale
Allendale's August 2026 forecast shows daily high temperatures ranging from 78° to 104°, with overnight lows between 56° and 62°. The average high for August is 92° 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 Allendale. See also: September | October | November.