S
M
T
W
T
F
S
26
90°
74°
27
93°
72°
28
97°
70°
29
96°
75°
30
93°
70°
31
96°
65°
1
94°
74°
2
91°
73°
3
90°
74°
4
93°
75°
5
90°
73°
6
92°
71°
7
89°
70°
8
92°
71°
9
94°
72°
10
93°
75°
11
96°
72°
12
94°
71°
13
98°
74°
14
96°
73°
15
97°
74°
16
97°
77°
17
99°
75°
18
97°
76°
19
97°
73°
20
98°
74°
21
94°
72°
22
87°
70°
23
95°
69°
24
97°
69°
25
92°
65°
26
91°
71°
27
86°
74°
28
86°
70°
29
87°
71°
30
89°
72°
31
94°
70°
1
97°
72°
2
98°
72°
3
98°
72°
4
97°
71°
5
100°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Elgin
Elgin's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Elgin. See also: September | October | November.