S
M
T
W
T
F
S
30
76°
53°
31
68°
62°
1
82°
65°
2
69°
62°
3
81°
62°
4
76°
63°
5
73°
57°
6
72°
52°
7
72°
48°
8
74°
47°
9
75°
53°
10
78°
62°
11
71°
50°
12
72°
46°
13
76°
62°
14
65°
44°
15
67°
39°
16
77°
51°
17
71°
63°
18
74°
54°
19
63°
53°
20
64°
55°
21
67°
49°
22
59°
45°
23
59°
41°
24
61°
41°
25
68°
46°
26
61°
49°
27
60°
44°
28
63°
44°
29
65°
45°
30
67°
47°
1
63°
46°
2
64°
43°
3
58°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lake Ariel
Lake Ariel's September 2026 forecast shows daily high temperatures ranging from 58° to 68°, with overnight lows between 41° and 49°. The average high for September is 63° with an average low of 45°. 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 Lake Ariel. See also: October | November | December.