S
M
T
W
T
F
S
30
80°
37°
31
81°
38°
1
81°
42°
2
87°
45°
3
85°
42°
4
77°
42°
5
79°
37°
6
80°
39°
7
78°
41°
8
79°
42°
9
82°
41°
10
82°
42°
11
81°
44°
12
85°
45°
13
87°
39°
14
84°
34°
15
76°
35°
16
76°
36°
17
77°
38°
18
77°
41°
19
84°
39°
20
85°
38°
21
84°
33°
22
80°
31°
23
73°
32°
24
71°
31°
25
72°
29°
26
71°
31°
27
71°
36°
28
74°
37°
29
78°
31°
30
77°
30°
1
Hist. Avg.
72°
41°
2
Hist. Avg.
72°
41°
3
Hist. Avg.
71°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Bartle
Bartle's September 2026 forecast shows daily high temperatures ranging from 71° to 87°, with overnight lows between 29° and 45°. The average high for September is 79° with an average low of 37°. 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 Bartle. See also: October | November | December.