S
M
T
W
T
F
S
30
94°
68°
31
93°
69°
1
95°
69°
2
95°
68°
3
94°
69°
4
95°
70°
5
94°
69°
6
95°
67°
7
94°
60°
8
85°
60°
9
85°
65°
10
89°
65°
11
91°
64°
12
91°
64°
13
84°
65°
14
90°
66°
15
91°
57°
16
90°
57°
17
82°
56°
18
80°
57°
19
80°
55°
20
81°
54°
21
79°
54°
22
79°
53°
23
80°
54°
24
80°
55°
25
81°
61°
26
80°
61°
27
85°
62°
28
83°
62°
29
85°
55°
30
81°
58°
1
79°
55°
2
78°
51°
3
77°
55°
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 77° to 95°, with overnight lows between 51° and 70°. The average high for September is 86° with an average low of 61°. 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.