S
M
T
W
T
F
S
30
78°
66°
31
79°
69°
1
81°
70°
2
82°
69°
3
82°
69°
4
81°
68°
5
79°
69°
6
80°
67°
7
80°
68°
8
79°
67°
9
79°
68°
10
80°
67°
11
80°
67°
12
81°
69°
13
80°
68°
14
Hist. Avg.
81°
70°
15
Hist. Avg.
81°
70°
16
Hist. Avg.
81°
70°
17
Hist. Avg.
81°
70°
18
Hist. Avg.
81°
70°
19
Hist. Avg.
81°
70°
20
Hist. Avg.
81°
70°
21
Hist. Avg.
81°
70°
22
Hist. Avg.
81°
70°
23
Hist. Avg.
81°
70°
24
Hist. Avg.
81°
69°
25
Hist. Avg.
80°
69°
26
Hist. Avg.
80°
69°
27
Hist. Avg.
80°
69°
28
Hist. Avg.
80°
69°
29
Hist. Avg.
80°
69°
30
Hist. Avg.
80°
69°
1
Hist. Avg.
80°
69°
2
Hist. Avg.
80°
69°
3
Hist. Avg.
80°
69°
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 78° to 82°, with overnight lows between 66° and 70°. The average high for September is 80° with an average low of 68°. 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.
