S
M
T
W
T
F
S
30
93°
57°
31
87°
54°
1
79°
55°
2
96°
57°
3
95°
64°
4
97°
61°
5
94°
65°
6
96°
63°
7
95°
64°
8
84°
54°
9
81°
53°
10
93°
58°
11
88°
47°
12
73°
51°
13
67°
44°
14
68°
46°
15
72°
49°
16
76°
50°
17
68°
50°
18
72°
49°
19
75°
49°
20
76°
51°
21
73°
45°
22
78°
52°
23
77°
52°
24
68°
51°
25
73°
51°
26
71°
50°
27
76°
50°
28
72°
47°
29
66°
41°
30
58°
38°
1
60°
35°
2
57°
34°
3
59°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Box Elder
Box Elder's September 2026 forecast shows daily high temperatures ranging from 57° to 93°, with overnight lows between 34° and 58°. The average high for September is 72° with an average low of 48°. 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 Elder. See also: October | November | December.
