S
M
T
W
T
F
S
30
84°
68°
31
85°
68°
1
83°
69°
2
78°
66°
3
77°
64°
4
79°
67°
5
81°
69°
6
81°
69°
7
83°
68°
8
83°
67°
9
82°
68°
10
82°
68°
11
79°
67°
12
79°
67°
13
78°
65°
14
77°
64°
15
76°
63°
16
78°
64°
17
77°
63°
18
75°
64°
19
76°
63°
20
75°
63°
21
75°
64°
22
78°
63°
23
78°
64°
24
79°
65°
25
78°
64°
26
77°
65°
27
78°
65°
28
78°
64°
29
77°
64°
30
78°
63°
1
77°
63°
2
78°
64°
3
78°
61°
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 75° to 85°, with overnight lows between 61° and 69°. The average high for September is 79° with an average low of 65°. 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.
