S
M
T
W
T
F
S
30
86°
67°
31
86°
67°
1
84°
66°
2
83°
67°
3
83°
67°
4
82°
63°
5
82°
60°
6
83°
61°
7
86°
64°
8
85°
63°
9
82°
62°
10
82°
64°
11
80°
58°
12
83°
58°
13
86°
61°
14
83°
56°
15
80°
55°
16
79°
56°
17
78°
55°
18
80°
56°
19
84°
56°
20
84°
57°
21
83°
60°
22
84°
62°
23
83°
60°
24
80°
58°
25
82°
57°
26
83°
60°
27
83°
56°
28
82°
59°
29
83°
58°
30
83°
59°
1
82°
58°
2
82°
58°
3
81°
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 78° to 86°, with overnight lows between 50° and 67°. The average high for September is 83° with an average low of 60°. 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.
