S
M
T
W
T
F
S
26
78°
53°
27
77°
54°
28
81°
54°
29
82°
61°
30
83°
58°
31
77°
57°
1
77°
55°
2
80°
59°
3
83°
61°
4
82°
54°
5
77°
53°
6
74°
53°
7
76°
57°
8
76°
57°
9
78°
55°
10
82°
60°
11
83°
61°
12
83°
59°
13
81°
54°
14
75°
53°
15
75°
52°
16
76°
54°
17
78°
53°
18
76°
59°
19
79°
56°
20
75°
52°
21
73°
50°
22
74°
51°
23
77°
55°
24
76°
57°
25
74°
55°
26
73°
50°
27
72°
48°
28
71°
50°
29
72°
52°
30
72°
50°
31
73°
51°
1
74°
52°
2
75°
52°
3
77°
51°
4
78°
55°
5
77°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Algonquin
Algonquin's August 2026 forecast shows daily high temperatures ranging from 71° to 83°, with overnight lows between 48° and 61°. The average high for August is 77° 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 Algonquin. See also: September | October | November.
