S
M
T
W
T
F
S
30
90°
66°
31
89°
65°
1
88°
61°
2
88°
56°
3
79°
58°
4
81°
64°
5
87°
65°
6
88°
62°
7
87°
63°
8
85°
62°
9
82°
62°
10
80°
56°
11
78°
55°
12
78°
55°
13
79°
60°
14
82°
61°
15
83°
61°
16
79°
60°
17
78°
59°
18
78°
50°
19
75°
50°
20
73°
52°
21
74°
55°
22
77°
58°
23
79°
58°
24
80°
59°
25
81°
50°
26
80°
51°
27
72°
50°
28
71°
49°
29
71°
49°
30
71°
57°
1
80°
57°
2
Hist. Avg.
74°
51°
3
Hist. Avg.
74°
50°
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 71° to 90°, with overnight lows between 49° and 66°. The average high for September is 80° with an average low of 57°. 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.
