S
M
T
W
T
F
S
30
86°
65°
31
88°
70°
1
91°
75°
2
95°
73°
3
90°
70°
4
83°
69°
5
81°
63°
6
81°
58°
7
81°
61°
8
85°
61°
9
88°
71°
10
83°
71°
11
82°
66°
12
83°
64°
13
85°
68°
14
73°
58°
15
82°
55°
16
86°
66°
17
84°
72°
18
79°
63°
19
72°
62°
20
73°
64°
21
64°
55°
22
61°
57°
23
70°
57°
24
70°
52°
25
73°
45°
26
74°
51°
27
74°
53°
28
68°
60°
29
75°
60°
30
76°
55°
1
84°
66°
2
74°
54°
3
68°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lisbon
Lisbon's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Lisbon. See also: October | November | December.
