S
M
T
W
T
F
S
30
84°
64°
31
88°
59°
1
85°
55°
2
N/A
3
85°
66°
4
86°
65°
5
84°
71°
6
83°
68°
7
81°
68°
8
85°
60°
9
78°
57°
10
75°
56°
11
75°
59°
12
74°
53°
13
69°
52°
14
73°
51°
15
72°
50°
16
74°
53°
17
74°
56°
18
75°
54°
19
75°
55°
20
74°
54°
21
70°
54°
22
72°
52°
23
73°
55°
24
74°
53°
25
73°
48°
26
62°
43°
27
61°
40°
28
59°
40°
29
69°
42°
30
58°
39°
1
59°
47°
2
58°
44°
3
59°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Big Lake
Big Lake's September 2026 forecast shows daily high temperatures ranging from 58° to 86°, with overnight lows between 39° and 71°. The average high for September is 72° with an average low of 53°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Big Lake. See also: October | November | December.