S
M
T
W
T
F
S
26
87°
70°
27
84°
69°
28
80°
63°
29
82°
57°
30
88°
58°
31
86°
60°
1
74°
66°
2
79°
60°
3
82°
57°
4
86°
58°
5
84°
62°
6
80°
68°
7
86°
65°
8
86°
63°
9
81°
56°
10
84°
67°
11
81°
63°
12
81°
65°
13
81°
66°
14
84°
63°
15
79°
68°
16
83°
61°
17
81°
56°
18
81°
64°
19
74°
59°
20
74°
56°
21
76°
53°
22
78°
56°
23
81°
59°
24
82°
60°
25
83°
63°
26
79°
59°
27
79°
57°
28
80°
56°
29
78°
59°
30
81°
62°
31
73°
56°
1
74°
61°
2
72°
61°
3
73°
57°
4
72°
56°
5
73°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in DeWitt
DeWitt's August 2026 forecast shows daily high temperatures ranging from 72° to 83°, with overnight lows between 53° and 68°. The average high for August is 78° with an average low of 59°. 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 DeWitt. See also: September | October | November.