S
M
T
W
T
F
S
26
81°
67°
27
78°
67°
28
86°
68°
29
85°
68°
30
86°
67°
31
84°
68°
1
86°
68°
2
85°
68°
3
86°
67°
4
84°
66°
5
84°
67°
6
85°
68°
7
86°
66°
8
77°
63°
9
77°
64°
10
78°
65°
11
83°
67°
12
84°
68°
13
85°
69°
14
85°
67°
15
84°
66°
16
78°
64°
17
77°
63°
18
77°
65°
19
82°
65°
20
83°
64°
21
84°
65°
22
83°
61°
23
80°
57°
24
75°
57°
25
76°
58°
26
76°
57°
27
77°
56°
28
77°
56°
29
79°
60°
30
81°
63°
31
76°
63°
1
78°
62°
2
82°
59°
3
81°
53°
4
73°
55°
5
73°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Round Lake
Round Lake's August 2026 forecast shows daily high temperatures ranging from 73° to 86°, with overnight lows between 53° and 69°. The average high for August is 81° 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 Round Lake. See also: September | October | November.
