S
M
T
W
T
F
S
30
67°
55°
31
68°
50°
1
68°
49°
2
66°
54°
3
66°
49°
4
71°
48°
5
66°
50°
6
67°
52°
7
69°
53°
8
70°
54°
9
71°
52°
10
68°
52°
11
68°
53°
12
69°
52°
13
69°
52°
14
68°
53°
15
70°
52°
16
68°
50°
17
66°
52°
18
67°
52°
19
68°
46°
20
64°
47°
21
63°
46°
22
64°
45°
23
65°
51°
24
65°
52°
25
64°
52°
26
67°
51°
27
67°
51°
28
66°
50°
29
63°
48°
30
61°
45°
1
60°
43°
2
60°
43°
3
62°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Liss
Liss's September 2026 forecast shows daily high temperatures ranging from 60° to 71°, with overnight lows between 43° and 55°. The average high for September is 66° with an average low of 50°. 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 Liss. See also: October | November | December.