S
M
T
W
T
F
S
30
82°
51°
31
70°
57°
1
71°
57°
2
68°
54°
3
73°
53°
4
79°
58°
5
75°
45°
6
69°
48°
7
68°
47°
8
75°
53°
9
63°
39°
10
59°
44°
11
73°
52°
12
53°
46°
13
57°
38°
14
63°
42°
15
65°
47°
16
66°
46°
17
64°
47°
18
66°
47°
19
64°
46°
20
65°
47°
21
65°
46°
22
62°
45°
23
62°
44°
24
62°
44°
25
61°
43°
26
60°
44°
27
61°
43°
28
58°
42°
29
57°
41°
30
54°
41°
1
57°
42°
2
56°
41°
3
57°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ponask Lake
Ponask Lake's September 2026 forecast shows daily high temperatures ranging from 53° to 79°, with overnight lows between 38° and 58°. The average high for September is 64° with an average low of 46°. 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 Ponask Lake. See also: October | November | December.