S
M
T
W
T
F
S
30
63°
45°
31
68°
43°
1
70°
41°
2
72°
37°
3
73°
43°
4
77°
37°
5
77°
39°
6
79°
41°
7
73°
48°
8
77°
34°
9
72°
32°
10
73°
27°
11
73°
32°
12
77°
41°
13
77°
41°
14
72°
41°
15
72°
37°
16
61°
45°
17
61°
46°
18
68°
43°
19
61°
39°
20
57°
34°
21
64°
28°
22
68°
30°
23
66°
46°
24
63°
44°
25
66°
46°
26
72°
46°
27
70°
47°
28
66°
43°
29
56°
40°
30
68°
42°
1
66°
39°
2
66°
38°
3
65°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Box Prairie
Box Prairie's September 2026 forecast shows daily high temperatures ranging from 56° to 72°, with overnight lows between 38° and 47°. The average high for September is 66° with an average low of 43°. 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 Box Prairie. See also: October | November | December.