S
M
T
W
T
F
S
30
80°
61°
31
80°
60°
1
79°
61°
2
79°
61°
3
81°
60°
4
84°
60°
5
78°
53°
6
78°
54°
7
83°
56°
8
83°
54°
9
82°
53°
10
81°
57°
11
77°
51°
12
79°
53°
13
82°
58°
14
82°
50°
15
76°
51°
16
73°
50°
17
74°
49°
18
76°
51°
19
80°
49°
20
78°
50°
21
80°
55°
22
80°
55°
23
79°
53°
24
79°
50°
25
78°
50°
26
78°
54°
27
77°
54°
28
75°
53°
29
78°
52°
30
77°
52°
1
76°
51°
2
77°
51°
3
77°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lebanon
Lebanon's September 2026 forecast shows daily high temperatures ranging from 73° to 84°, with overnight lows between 49° and 61°. The average high for September is 79° with an average low of 54°. 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 Lebanon. See also: October | November | December.
