S
M
T
W
T
F
S
26
66°
56°
27
66°
55°
28
65°
56°
29
66°
55°
30
64°
55°
31
64°
54°
1
63°
55°
2
63°
55°
3
66°
56°
4
66°
56°
5
65°
55°
6
64°
54°
7
64°
52°
8
64°
51°
9
65°
53°
10
66°
54°
11
66°
54°
12
64°
51°
13
64°
51°
14
63°
54°
15
64°
53°
16
63°
54°
17
64°
50°
18
64°
51°
19
63°
53°
20
62°
51°
21
64°
51°
22
62°
53°
23
62°
51°
24
63°
50°
25
63°
50°
26
62°
52°
27
65°
53°
28
65°
53°
29
66°
52°
30
66°
53°
31
65°
53°
1
65°
52°
2
64°
53°
3
63°
53°
4
64°
52°
5
64°
52°
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 62° to 66°, with overnight lows between 50° and 56°. The average high for August is 64° with an average low of 53°. 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.