S
M
T
W
T
F
S
26
89°
70°
27
84°
71°
28
81°
62°
29
80°
58°
30
84°
57°
31
79°
67°
1
70°
65°
2
77°
58°
3
78°
59°
4
81°
63°
5
82°
62°
6
80°
62°
7
81°
64°
8
83°
67°
9
84°
62°
10
85°
63°
11
84°
63°
12
85°
64°
13
82°
61°
14
78°
58°
15
76°
58°
16
77°
65°
17
84°
65°
18
78°
63°
19
77°
61°
20
79°
63°
21
81°
57°
22
75°
57°
23
75°
58°
24
76°
56°
25
76°
55°
26
75°
55°
27
76°
58°
28
80°
60°
29
83°
63°
30
82°
63°
31
75°
62°
1
82°
62°
2
78°
58°
3
74°
54°
4
77°
59°
5
81°
61°
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 70° to 85°, with overnight lows between 54° and 67°. The average high for August is 79° with an average low of 61°. 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.
