S
M
T
W
T
F
S
26
95°
66°
27
96°
66°
28
95°
67°
29
96°
67°
30
91°
66°
31
94°
67°
1
96°
66°
2
96°
67°
3
95°
67°
4
95°
66°
5
91°
66°
6
90°
65°
7
94°
66°
8
95°
65°
9
95°
66°
10
95°
57°
11
87°
55°
12
85°
57°
13
88°
59°
14
87°
57°
15
92°
56°
16
90°
56°
17
89°
59°
18
90°
58°
19
92°
58°
20
92°
59°
21
91°
60°
22
91°
59°
23
90°
58°
24
90°
61°
25
89°
58°
26
88°
59°
27
87°
60°
28
88°
60°
29
86°
57°
30
82°
57°
31
81°
55°
1
80°
55°
2
82°
56°
3
81°
53°
4
79°
52°
5
79°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Collinston
Collinston's August 2026 forecast shows daily high temperatures ranging from 79° to 96°, with overnight lows between 52° and 67°. The average high for August is 90° 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 Collinston. See also: September | October | November.