S
M
T
W
T
F
S
26
79°
66°
27
79°
64°
28
80°
60°
29
79°
66°
30
83°
67°
31
85°
66°
1
80°
63°
2
83°
65°
3
83°
58°
4
78°
62°
5
79°
62°
6
78°
59°
7
79°
58°
8
80°
57°
9
79°
59°
10
80°
64°
11
82°
58°
12
79°
57°
13
80°
56°
14
78°
56°
15
78°
59°
16
79°
57°
17
76°
57°
18
77°
55°
19
77°
55°
20
78°
60°
21
79°
63°
22
82°
64°
23
84°
64°
24
84°
63°
25
85°
57°
26
80°
54°
27
77°
57°
28
78°
61°
29
81°
53°
30
77°
52°
31
76°
52°
1
75°
56°
2
74°
55°
3
75°
53°
4
74°
51°
5
73°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in De Witt
De Witt's August 2026 forecast shows daily high temperatures ranging from 73° to 85°, with overnight lows between 51° and 67°. The average high for August is 79° 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 De Witt. See also: September | October | November.