S
M
T
W
T
F
S
30
76°
57°
31
76°
57°
1
75°
53°
2
68°
49°
3
67°
49°
4
67°
50°
5
68°
48°
6
72°
55°
7
75°
56°
8
74°
56°
9
72°
55°
10
74°
56°
11
75°
55°
12
74°
55°
13
75°
56°
14
74°
46°
15
66°
46°
16
63°
45°
17
66°
46°
18
64°
44°
19
64°
43°
20
64°
44°
21
70°
47°
22
70°
50°
23
71°
42°
24
70°
41°
25
63°
41°
26
63°
44°
27
66°
49°
28
67°
48°
29
68°
39°
30
61°
40°
1
60°
46°
2
61°
46°
3
64°
45°
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 60° to 76°, with overnight lows between 39° and 57°. The average high for September is 69° with an average low of 49°. 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.