S
M
T
W
T
F
S
30
77°
57°
31
77°
63°
1
82°
68°
2
86°
68°
3
82°
63°
4
77°
63°
5
73°
59°
6
72°
52°
7
72°
54°
8
79°
61°
9
82°
65°
10
73°
58°
11
75°
55°
12
74°
58°
13
78°
57°
14
75°
55°
15
72°
54°
16
71°
52°
17
71°
53°
18
70°
53°
19
69°
51°
20
68°
47°
21
73°
53°
22
70°
52°
23
68°
51°
24
70°
51°
25
71°
50°
26
72°
51°
27
71°
50°
28
71°
51°
29
72°
51°
30
72°
50°
1
71°
50°
2
69°
48°
3
69°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Boswell
Boswell's September 2026 forecast shows daily high temperatures ranging from 68° to 82°, with overnight lows between 43° and 65°. The average high for September is 72° with an average low of 53°. 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 Boswell. See also: October | November | December.