S
M
T
W
T
F
S
30
73°
45°
31
64°
40°
1
63°
48°
2
70°
48°
3
72°
46°
4
70°
36°
5
60°
34°
6
59°
37°
7
59°
34°
8
58°
32°
9
55°
34°
10
56°
36°
11
57°
38°
12
57°
39°
13
59°
39°
14
63°
44°
15
65°
42°
16
64°
39°
17
60°
29°
18
54°
34°
19
54°
43°
20
61°
40°
21
61°
40°
22
54°
36°
23
53°
36°
24
53°
35°
25
52°
29°
26
51°
30°
27
52°
37°
28
53°
38°
29
50°
29°
30
56°
36°
1
50°
37°
2
58°
37°
3
57°
31°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mildred Lake
Mildred Lake's September 2026 forecast shows daily high temperatures ranging from 50° to 73°, with overnight lows between 29° and 48°. The average high for September is 59° with an average low of 37°. 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 Mildred Lake. See also: October | November | December.