S
M
T
W
T
F
S
26
84°
62°
27
84°
62°
28
83°
61°
29
83°
60°
30
82°
59°
31
75°
55°
1
75°
53°
2
76°
53°
3
76°
56°
4
77°
59°
5
76°
57°
6
78°
59°
7
76°
60°
8
77°
59°
9
76°
59°
10
80°
52°
11
76°
52°
12
80°
57°
13
79°
58°
14
83°
59°
15
82°
58°
16
81°
58°
17
82°
57°
18
82°
58°
19
80°
53°
20
78°
50°
21
74°
49°
22
74°
48°
23
75°
49°
24
76°
51°
25
79°
52°
26
80°
53°
27
80°
49°
28
79°
51°
29
77°
52°
30
78°
54°
31
80°
54°
1
79°
45°
2
76°
46°
3
71°
48°
4
74°
53°
5
76°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Effingham
Effingham's August 2026 forecast shows daily high temperatures ranging from 71° to 84°, with overnight lows between 45° and 62°. The average high for August is 78° with an average low of 55°. 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 Effingham. See also: September | October | November.
