S
M
T
W
T
F
S
26
99°
70°
27
97°
71°
28
87°
66°
29
93°
67°
30
90°
71°
31
75°
64°
1
85°
60°
2
84°
58°
3
86°
65°
4
76°
61°
5
80°
53°
6
82°
55°
7
77°
57°
8
82°
54°
9
84°
64°
10
82°
61°
11
85°
65°
12
86°
64°
13
74°
65°
14
81°
60°
15
82°
68°
16
80°
61°
17
85°
54°
18
82°
49°
19
80°
58°
20
80°
61°
21
80°
57°
22
80°
50°
23
80°
59°
24
82°
63°
25
81°
60°
26
84°
58°
27
84°
58°
28
86°
61°
29
82°
58°
30
79°
56°
31
78°
55°
1
69°
56°
2
70°
54°
3
71°
52°
4
71°
57°
5
74°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Forest Lake
Forest Lake's August 2026 forecast shows daily high temperatures ranging from 69° to 86°, with overnight lows between 49° and 63°. The average high for August is 79° with an average low of 57°. 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 Forest Lake. See also: September | October | November.