S
M
T
W
T
F
S
30
89°
70°
31
85°
65°
1
85°
63°
2
86°
65°
3
85°
65°
4
85°
66°
5
88°
69°
6
85°
72°
7
88°
69°
8
91°
68°
9
90°
69°
10
87°
66°
11
85°
67°
12
84°
65°
13
84°
67°
14
87°
67°
15
86°
64°
16
89°
68°
17
89°
67°
18
81°
62°
19
82°
62°
20
85°
64°
21
87°
66°
22
85°
66°
23
84°
67°
24
83°
64°
25
84°
65°
26
87°
66°
27
87°
67°
28
86°
66°
29
87°
65°
30
85°
66°
1
86°
65°
2
85°
65°
3
83°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Bartolo
Bartolo's September 2026 forecast shows daily high temperatures ranging from 81° to 91°, with overnight lows between 62° and 72°. The average high for September is 86° 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 Bartolo. See also: October | November | December.