S
M
T
W
T
F
S
26
87°
70°
27
92°
71°
28
87°
69°
29
85°
62°
30
84°
64°
31
78°
65°
1
75°
68°
2
82°
67°
3
85°
63°
4
85°
63°
5
86°
63°
6
78°
68°
7
89°
68°
8
89°
71°
9
88°
69°
10
91°
75°
11
92°
75°
12
87°
73°
13
92°
72°
14
88°
71°
15
86°
74°
16
88°
68°
17
84°
64°
18
86°
68°
19
84°
64°
20
79°
62°
21
82°
62°
22
83°
60°
23
82°
61°
24
87°
63°
25
89°
66°
26
87°
65°
27
87°
64°
28
86°
60°
29
85°
61°
30
87°
64°
31
88°
66°
1
87°
66°
2
86°
65°
3
80°
59°
4
79°
57°
5
79°
60°
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 79° to 89°, with overnight lows between 57° and 74°. The average high for August is 85° with an average low of 64°. 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.
