S
M
T
W
T
F
S
26
54°
49°
27
64°
43°
28
60°
42°
29
65°
46°
30
59°
45°
31
66°
47°
1
62°
46°
2
65°
47°
3
66°
48°
4
67°
47°
5
67°
48°
6
66°
47°
7
66°
47°
8
61°
45°
9
59°
45°
10
63°
44°
11
62°
46°
12
60°
42°
13
54°
38°
14
54°
37°
15
55°
39°
16
56°
38°
17
60°
43°
18
62°
42°
19
62°
43°
20
61°
40°
21
62°
44°
22
61°
43°
23
56°
32°
24
49°
31°
25
49°
32°
26
48°
31°
27
49°
30°
28
51°
34°
29
50°
33°
30
51°
34°
31
55°
33°
1
47°
30°
2
45°
29°
3
44°
28°
4
44°
27°
5
45°
26°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Big Lake
Big Lake's August 2026 forecast shows daily high temperatures ranging from 44° to 67°, with overnight lows between 26° and 49°. The average high for August is 57° with an average low of 40°. 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 Big Lake. See also: September | October | November.