S
M
T
W
T
F
S
30
87°
63°
31
88°
65°
1
88°
64°
2
86°
60°
3
85°
62°
4
85°
63°
5
86°
62°
6
85°
61°
7
84°
62°
8
84°
63°
9
85°
62°
10
84°
64°
11
83°
61°
12
83°
63°
13
84°
62°
14
83°
60°
15
82°
62°
16
83°
63°
17
82°
62°
18
82°
60°
19
81°
59°
20
Hist. Avg.
74°
61°
21
Hist. Avg.
74°
61°
22
Hist. Avg.
74°
60°
23
Hist. Avg.
74°
60°
24
Hist. Avg.
73°
60°
25
Hist. Avg.
73°
60°
26
Hist. Avg.
73°
60°
27
Hist. Avg.
73°
60°
28
Hist. Avg.
73°
59°
29
Hist. Avg.
72°
59°
30
Hist. Avg.
72°
59°
1
Hist. Avg.
72°
59°
2
Hist. Avg.
72°
59°
3
Hist. Avg.
71°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Portugal
Portugal's September 2026 forecast shows daily high temperatures ranging from 81° to 88°, with overnight lows between 59° and 65°. The average high for September is 84° with an average low of 62°. 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 Portugal. See also: October | November | December.
