S
M
T
W
T
F
S
30
80°
66°
31
82°
68°
1
83°
69°
2
79°
67°
3
82°
69°
4
81°
68°
5
80°
67°
6
80°
68°
7
79°
68°
8
78°
67°
9
80°
67°
10
82°
68°
11
82°
68°
12
81°
67°
13
82°
68°
14
82°
67°
15
81°
66°
16
81°
67°
17
80°
67°
18
81°
66°
19
81°
67°
20
80°
67°
21
81°
66°
22
80°
66°
23
80°
65°
24
79°
66°
25
80°
66°
26
80°
65°
27
79°
66°
28
77°
63°
29
77°
62°
30
74°
63°
1
74°
62°
2
78°
60°
3
78°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Barcelona
Barcelona's September 2026 forecast shows daily high temperatures ranging from 74° to 83°, with overnight lows between 60° and 69°. The average high for September is 80° with an average low of 66°. 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 Barcelona. See also: October | November | December.
