S
M
T
W
T
F
S
30
74°
60°
31
80°
61°
1
80°
60°
2
81°
56°
3
79°
52°
4
78°
57°
5
79°
50°
6
78°
50°
7
71°
56°
8
70°
56°
9
75°
52°
10
70°
49°
11
69°
56°
12
76°
48°
13
73°
52°
14
74°
53°
15
74°
56°
16
68°
48°
17
73°
47°
18
67°
48°
19
Hist. Avg.
66°
50°
20
Hist. Avg.
66°
50°
21
Hist. Avg.
65°
50°
22
Hist. Avg.
65°
49°
23
Hist. Avg.
65°
49°
24
Hist. Avg.
64°
49°
25
Hist. Avg.
64°
48°
26
Hist. Avg.
63°
48°
27
Hist. Avg.
63°
48°
28
Hist. Avg.
63°
47°
29
Hist. Avg.
62°
47°
30
Hist. Avg.
62°
47°
1
Hist. Avg.
61°
46°
2
Hist. Avg.
61°
46°
3
Hist. Avg.
61°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lisbon
Lisbon's September 2026 forecast shows daily high temperatures ranging from 67° to 81°, with overnight lows between 47° and 61°. The average high for September is 74° with an average low of 53°. 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.
